I bought these last year and wore them on a mix of backpacking trips, day hikes, and off-trail forestry work. They've seen probably 250 miles of use, and they just barely show it.

Fit:

Low to mid volume, medium heel, medium to wide forefoot and a somewhat rounder toe-box (compared to most). True-to-length and medium to narrowish overall. I have a low volume medium width foot with wide squared toes and bought a half-size up to accomodate my toes. If you have narrower feet I'd recommend ordering your measured size.

The dual footbed is a bit gimmicky and provides little support. I subsituted for a much sturdier footbed with actual arch support and a deep heel cup.

Upper:

Composed of good quality and durable suede that stands up well to off-trail conditions. Stitching is doubled all around and very high-quality work. GTX works well and the boots are waterproof. The toe rand peels back a little over time but this happens with all boots that have this.

Unfortunately, the lack of padding around the ankle leads to chaffing and blisters for me when the lacing is "locked down". Keeps my heel stable but the inflexibility of the sole and the lack of padding makes the hard heel counter put too much pressure on the back of my heel during hill accents. So much for a zero-blister guarantee - a silly idea for any manufacturer.

Midsole:

Thin but does a great job of absorbing impacts. The low to the ground feel relative to other boots is a welcome change and improves stability. The shank is quite stiff - it filters out sharp stones and edges very well, but almost too much. There's not enough toe flex in my opinion for backpacking and day hiking on uneven surfaces where flexibility helps improve stability. Overall stability on flat ground is good but lack of flexibility makes it a little unsteady off-trail. Yet it is not stiff enough for proper crampons and mountaineering use (where its brother, the Rapace, fill this role well). The Mtn Trainer tries too hard to bridge between hiking and mountaineering, but should just accept that it is a burlier hiking boot and allow better forefoot flex.

Outsole:

Tread is ok - great on loose materials and rock, slick on wet leaves and hard-packed snow. The tread is deep but the flat lugs make for poor traction on smooth wet or icy surfaces. The front is very flat and smooth and listed as the "climbing zone" - a strange decision IMO. These are not good climbing boots, and the lack of lugs in this area makes for poor grip on trails and toe-off - I've slipped a few times trying to grab surfaces with the tip of my foot. The attempt to fuse a climbing boot and a hiking boot is an interesting idea but the execution fails to impress. Good general tread for trails and ok for off-trail. Not recommended for wet freezing trails with lots of smooth rock.

Overall:

The boot is very lightweight, durable, and handsome. The fit accomodates a variety of foot shapes. The overly stiff shank and lack of padding around the back of the heel leads to hotspots and blisters on my feet - a bad combination. The lack of some inexpensive padding at the back of the heel is a perplexing oversight.

The pre-occupation of Salewa to make the Mtn Trainer a hybrid do-everything model is an interesting concept but it compromises too much on the main elements for the intended use of the boot  - hiking. As a result comfort, grip, and stability suffer a bit for it. With the Rapace model on the mountaineering side, and the Alp trainer on the lighter side, this model errs too close to the Rapace in function and would serve better if it were built as a beefed up Alp trainer instead of a softened up Rapace, though I am glad it is built on the wider Rapace last and not the narrower Alp Trainer.