Tallboy Carbon here. I’ve had mine a year, it’s been to Wales, Lakes and Peaks. It’s been absolutely blinding. I’m 5’11 and I’m running a large with a 90 mm stem and Easton flat bars. It’s got a 100mm fox fork up front and full XTR with stans rims on DT hubs. It’s just over 25lbs with a carbon post and 2.2 X-kings. If I stick a reverb and and Rubber queens on its just a gnats over 26.5lbs.
It’s been really reliable and I’ve not had bushing problems, but it’s not ridden on rocky stuff too much about 25 days this year, the rest is XC stuff in Hertfordshire and places like wend over and swinley.