I hated the Endura Clickfast liners that came with my SingleTrack shorts many years ago, they were uncomfortable, odd shape, cheap looking/feeling and if attached to the shorts they were in totally the wrong place. But really like their separate ones I bought this summer for about £15-20. These were a mesh material rather than lycra-like. Better fit, nicer material and much comfier.
I usually don’t ride my MTB with padded shorts (although padded bib shorts for the road bike all the time), but I think that’s mainly due to my bad experience with the early pairs I had. I’ll be getting another pair of the Coolmax mesh Endura ones again as they were so much better than the Clickfast pair that came with the shorts.
Tom KP