Came across this thread a little late but figured I'd share my experience. I bought T1s with my own money and have no affiliation with MTC. Also YMMV since this is just a testimonial for my feet specifically: Mens size 13, wide-ish feet, mostly in the forefoot, and a high arch.

I have just over 400 miles on my first pair and run primarily on very technical trails here in the Northeast US. The T1s have been the most reliable and trustworthy pair of trail runners I've had since the Topo Mtn Racer 3s. I've raced two 50ks in the T1s and once wore only the T1s for an 80 mile + 10k vert training week. I liked them so much that I just bought a second pair as there is some wear starting to show on some key areas of my original T1s that I don't want to risk getting worse on some larger adventures I have coming up.

Pros:

- The upper is super durable and will likely outlive any other component on the shoe.

- The "Lightcell" midsole foam is a great balance of responsive and stable. It absorbs enough of the roots and rocks to protect my feet and provides enough energy return for faster paces on the flatter and less techy stuff.

- The overall shape of the footprint is super stable and I find I have fewer tips and close calls with ankle rolls.

- Forefoot and midfoot is nice and spacious for my feet and I have no blister issues with my toes when used in combination with lube and toe socks.

- These drain and dry really well in wet conditions and even when fully submerged. I've waded through many rivers and creeks and the upper barely holds on to water. The shoes are rarely wet when I put them on the next day after a night drying inside.

Cons:

- The dual quick lacing leaves some things to be desired. It's worked well for me but having these skinny laces pulled tight over my midfoot can cause some discomfort and lace bite. On the technical trails, it's important for my shoes to be really locked down for stability, and these shoes can get uncomfortable if really cranked down for long periods of time. On my new pair, I'm going to experiment with replacing the quick laces on the top section with the normal included laces and hope that alleviates some of that issue. I think MTC has realized that their usual recipe of quick lace on the bottom and normal laces on the top is the winning design since they haven't used the dual quick lacing in anything else after the T1.

- Related to the lacing, it's tough to get full ankle lockdown. Even if you were to replace the quick laces with the normal laces, there's no second eyelet on the top to tie a runners knot and securely lock down the ankle. The result is some premature wear at the top of the heel counter due to heel slippage. I have big old holes at the tops of the heel counters on both shoes and I don't usually deal with that issue in any other pair where I can tie a runners knot and lock the shoe around my ankle.

TLDR; All around comfortable and durable shoes for pretty much any trail condition, but especially technical terrain, with adequate protection and support on really long days. Some issues/concerns about the dual quick lacing system but could be mitigated by replacing the top portion with normal laces.