I think, they are true to size (compared to the H moccassins). Though comfy? It might depend on the ratio of the circumference of the calves to the length of the feet/shoe size.
If, as with me, the boot shaft is still a bit too wide/roomy, it can reach so high that - when sitting down - the rather hard leather loop stings the crook of my knee and the leather strap on the back buckled at the level of my Achilles tendon, which was rather painful - sigh - couldn't take them home.
Also: who has a bunion: it can be quite visible through the fabric. (I have the shorter boots - very comfy, though the bunions might show more after wearing a couple of times...)