Son bought himself a Nerve AL 6.0 (i.e. the 2015 model) just under 12 months ago.
Seems fairly bulletproof and keeps a smile on his face.
One of the pivot bolts has occasionally worked a little loose, but nothing a quick tightening can’t sort.
As some of the reviews have said, could do with a clutched rear mech. The wheels on the new one look like a small upgrade (CrossRide vs CrossOne) compared to the 2015 model.
No other issues of note (none that we know about anyway!).
Unless there is something we don’t know about, the frame is the same for the £1199 model as with the £2,599 model so its simply about components the higher up the range you go. The only addition made to my son’s has been a Reverb seatpost which he’s worked hard to fund and is really enjoying the use of.
In an ideal world, he should probably have tried to afford the Spectral for the longer travel, but it was out of the budget range. 120mm is working fine though.