Owned the 54 T.Finder this year, and still currently the 56 Stealth. At ~165-170lbs, size 8US Ion Leather boots, mod-Genies/Cartel combo binders.
Def a charger for me with my specs above; borderline plank-ish esp in bulletproof conditions here in Ontario. Strongest suit is def going fast; charging hard esp on wide open groomers. Turn initiation can potentially feel slow if have softer bindings and/or boots, and small boot size (technique also plays a major role, of course). If looking for something mellow and/or forgiving, these boards aren't it lol.
Havent gotten many deep days with them yet, so can't delve much on that aspect right now. But will be making the trek to pow mecca (Japan) this coming winter, so hoping to see how well it floats in deep snow.
Also, any board I own I usually ride both on hill and in the park. Rode the 54 Tranny Finder a ton especially; the more fun and versatile of the two. They're pretty fun on jumps and quite boosty. Esp on colder/slicker days, find myself landing near the flat bottom far more than I'd like lol. I didn't jib with them all that much (aka avoided them, as can be seen in edit below lol). Not the ideal choice for that type of riding anyway, so can't say much for that either.
Have since given the 54 T.Finder to my bro, but have replaced it with the 57 T.Finder + this summer. Excited to see how the regular and plus line compare/differ on snow.
Anyhow, here's a short edit from spring hot laps on the 54 T.Finder this past winter.
https://youtu.be/ELKsB-tjkjA