Fair few of these just are non-issues.
Battery is what it is, that might be an issue.
Instructions - just google it Mate. Anything you need to know is a click away.
Cases? Add ons? Get it online. Easy to research, cheaper and arrives on your door.
Google Music? If you don't like it, use a different music app.
SD cards? I just got a 128gb SD card from Amazon for £30. At least this phone lets you put in an SD card (Apple, I'm glaring at you).

Consumers don't have to think for one moment about what the shady manufacturers want them to do.
Which is exactly why the contract being with the retailer, not the manufacturer is the important aspect to be aware of!
Amazon, for example, are doing their best to b.s. people that they only have 30 days to return even faulty products (FFS!). Which is practically criminal (as denying customers their statutory rights is a criminal offence, not just a civil contract breach).
This is why I won't buy any products that are "Sold By: [manufacturer name here, e.g. 'Anker'] and Fulfilled by Amazon.Why do you think Amazon don't just bulk-buy then resell themselves like for everything else?
High fault rate and cost of returns is probably why. Sold by = contract with, so Amazon can wash their hands of any problems, whilst taking a cut. The companies selling them aren't British, typically, thus hard to prosecute if they do refuse to give the minimum legal rights.
Thus, John Lewis, whilst being far more ethical than Amazon, do have to deal with this up to six years after purchase, not 12 months nor 24, let alone 30 days! Like 100% of UK retailers, legal minimum! Many idiots appear not to understand what the law means. Ridiculous, when for once, it's a law on the common man's side, you know? Sooooo much disinformation on these legal minimum rights. Sooooo many people just lying down, bending over, rolling over and taking it in the rear from these liars. It's a major part of their business model to save costs. But that's not the consumer's problem. So stop paying for poor business models and management inability to make money without breaking the law. Look around, it's happening all over these days. Making a genuine deal that much more difficult to check for validity. It's all wasted time for the consumer, a lot of cumulative hassle, and all that time is unpaid - and time is money. Make it their time and money instead. Cheers.

I'd probably pay a little more (£15) and get the G5
http://www.hotukdeals.com/deals/motorola-moto-g5-sim-free-2gb-gold-154-95-direct-mobiles-2647214?p=30393674

or £170 and get the 3GB version
https://www.amazon.co.uk/Lenovo-Moto-16GB-SIM-Free-Smartphone/dp/B01MR949PK/ref=sr_1_2?s=telephone&ie=UTF8&qid=1490624049&sr=1-2&keywords=Moto+G5

Voted hot

Shame white is so much dearer

I'd probably pay a little more (£15) and get the G5
http://www.hotukdeals.com/deals/motorola-moto-g5-sim-free-2gb-gold-154-95-direct-mobiles-2647214?p=30393674

or £170 and get the 3GB version
https://www.amazon.co.uk/Lenovo-Moto-16GB-SIM-Free-Smartphone/dp/B01MR949PK/ref=sr_1_2?s=telephone&ie=UTF8&qid=1490624049&sr=1-2&keywords=Moto+G5

I bought the white model from John Lewis last October, kind of wished I had spent more money on something else. The battery life is not all that good even when `Battery Saver` is switched on.
Google Music keep messing all the albums I downloaded up, i.e. if a track on an album is by multiple artists it will separate it from that album and list it as a separate album, even though I can alter it in iTunes on my computer, Google music will not recognise it as part of that album.
Also there is no little warning light on the phone like on previous Sony Xperia models I have had, that indicates when you have a text message, phone message etc. Really annoying!
I am also finding it difficult to find a decent phone case in the shops because most retailers are selling more iPhones or Samsung models, so they don't stock such items.
I can keep going if you wish. I have been onto Motorola customer support many times with regards to how to operate the phone. I am not technology illiterate as I am an ICT/Computing teacher, but the supplied and down loadable operational manual is appalling, and that it putting it politely..
One other thing. If you get a phone with Android 6 then you will probably want to increase the storage capacity. Android 6 takes up over 5GB of storage space, and I have just had the Android 7 upgrade which was an additional 240MB, so if you go for this phone I suggest you invest in an external memory card as 16GB will not be enough!

Yep, just bought the G5 for £15 more... a deal on here (not by me) that has over -100 heat. Can't wrap my head around HUKD sometimes. This deal is hot too.

having had the G3 i find the battery life is much better (even with a dual sim) and the TurboCharge option does make a difference, but i think most smartphones are too clever for their own good, which is why i now take a portable charger with me if i'm going to be out all day. as for Nougat, no issues with the update and a few extra features seem useful. as for GoogleMusic and a phone case, these not an issue with the phone itself, just personal preference/ gripe that are easily solved
there isn't much difference between the G4 and G5 unless you got the 3GB RAM version exclusive to Amazon

If anyone gets this and has 'ghost touch' issues then return it immediately. I would never buy another Motorola because of the issues I had with them, having made the mistake of buying the G4 directly from Motorola.

https://forums.lenovo.com/t5/Moto-G4-Moto-G4-Plus-Moto-G4/moto-g4-plus-charging-issue-quot-ghost-touch-quot/m-p/3622623#M20694

don't forget these are made by lenovo and prone to the magic ghost touch. I had a lenovo which developed the exact same problem after about 6 months.

https://www.youtube.com/watch?v=Z0BIX2GnARs