It's a great gadget.

If it works, definitely worth checking to see if your phone is on the might not work list. I've got a Moto Force X, and no matter what I've tried, no joy.

Bought thanks!

this is so last year..literally

Stopped playing this game. Was unrewarding and I put the time in. Should be able to unlock a definite Pokemon you do not have over a certain distance. Don't even care if it is 10miles of walking at least you know you could catch them all eventually or at least make progress.

Must admit, I've pretty much given up after playing its since day one, I'll just play the events from now on.

Have tried this out for a day. Here's my thoughts:
Cons:
- seems to disconnect quite a lot (using S7 edge)
- catch rate is quite poor when using it to get Pokemon
- can't tell what the Pokemon is! May lose one that you would razz/pinap berry with an ultra Ball and a 'great' or 'excellent' throw to give best chance of catching. :disappointed:
- when game is open and you're at a pokestop with Pokemon visible the go plus isn't vibrating and flashing to show that you're near something. Need to restart app and resync to fix it..
- have to keep dumping Pokemon as you will quickly catch 20,30,40 Pokemon without realising.

Pros:
- catch loads of Pokemon on journeys and fill up at pokestops that you would've ordinarily have not had the time/energy to get. Pressing a button while you're doing something else is super doable.
- radius around you seems to be greatly improved, pokestops that were ordinarily not reachable from locations that I've used previously are now accessible. Loads more Pokemon are clickable on the go plus.
- your pokebox and items fill up really quickly and surprises you how much you've done! Really really good!
- catch Pokemon that you wouldn't normally, extra exp, extra candies ready for future updates where they will add further evolutions.
-uses up standard pokeballs which I used to have to throw away to make space. Saves time dumping stuff.

Think that's about it. It would be nice to have a lanyard to wear it with because the watch and other method don't appeal to me. If you could manage the connectivity a little more and set timeout periods it would be better.
Android Wear used with this would be the ultimate if it showed you what you are about to try and catch - wishful thinking!
If you wouldn't be Pokemon hunting at the time and all the activity is essentially a bonus this is great. If you're out actively hunting using your phone is a lot better!

Just added the go plus as a trusted device, will see how it goes.

sums up my journey so far too :-)