Thomson seems to be pretty bad, everyone I know of has been back at least once and their response has always been along the lines of “Yeah, known issue, we know how to fix that”. Not encouraging.
I’d go KS, both of mine acted up almost immediately but were super reliable since. I had a replacement air cart put in one after about 3 years allround use but it was still working, just getting tired. Any issues since have been with cables, which are easily fixed. DIY servicing of everything but the air cart is pretty straightforward, parts are available from Stif and surprisingly cheap (I lost a cable end thingummy, I expected to be told a replacement would be a fiver or something, it was about 30p), servicing from Jungle is good value if a wee bit disorganised. Would Buy Again, the reliability’s been good enough for me to recommend even without the superior backup.
My Reverb’s been OK too, to be fair, but one year in and it’s getting cranky. And the cost of parts is a proper pisstake, I’m sure it’s purely coincidental that the lever’s both fairly delicate and very expensive to replace.
And gravity dropper, still good but once I tried longer travel, 100mm just basically felt like not very much. And parts availability’s not as easy as it was.