I really enjoyed my trip there (it was a couple weeks ago). A few poorly placed downed limbs shattered my mental flow the first lap on the "hard" loop. My ego was quivering in the corner after going across "the sidehill of doom" so that didn't help.
Once I started to get my mojo working, I really had a good time. In terms of technicality, skill required, and fitness test per foot, Thomas completely destroys Beverly and Sugar Bottom. I really like the "easy" loop for practicing some bike skills and I really felt like I accomplished something when I was able to successfully ride up those 3 down/up sections. I tried riding that bit backwards once - decided I wasn't really cut out for that. Actually had trouble WALKING up one of the hills
I had made up my mind that I was going to convert my current bike to a 1x9 setup (cause I never use my granny gear) and also really wanted to build a singlespeed. My trip to Thomas changed my opinion on that - I spent the whole time in granny gear.
The thing about Thomas, is that unlike Sugar or Beverly, I would NEVER take a person new to mountain biking there.
While sitting on a log trying to catch my breath, I was contemplating how lucky we are to have 3 riding area's convienent to CR, all of which offer completely unique, challenging and fun experiences.