so what about the 8 one star reviews?
one that talk about it getting too hot etc

Are the speeds the same, don't think so.

From where?

Kingston DataTraveler G4 128 GB USB 3.0 Flash Drive - Green, White
available at £21.69 inc VAT anytime

5 year Warranty

My ultra did 180mb sustained write of 50gb of films. Read is sustained 195mb. Slightly different cheaper model from tesco.

Amazon customer reviews are good for this. See here:

https://www.amazon.co.uk/SanDisk-Ultra-Flair-Flash-Drive/dp/B015CH1PJU/ref=pd_sim_147_4?ie=UTF8&dpID=31jFfS60xvL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=GJVDMHYN34NM2A9DX5KJ

Real world read/writes are gonna be very different.
Would be good if you could post a screen shot of it running crystal disk mark when you get yours.

This is what it has on their website:
USB 3.0 performance and high speeds of up to 150MB/s1 (32GB-128GB)
Transfer a full-length movie in less than 30 seconds2 (32GB-128GB)

Am not sure about it getting hot - only ordered mine this morning.

Performance stats? And does it get hot when in use?