Owned the 54 T.Finder this year, and still currently the 56 Stealth. At ~165-170lbs, size 8US Ion Leather boots w/ mod Genies/Cartel combo binders.
Def a charger for me given my specs above; borderline plank-ish esp when in bulletproof conditions here in Ontario, Canada. 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 (though technique plays a major role, as well of course). If you want something mellow and/or forgiving, this board is not for you lol.
We don't get deep days here often, so can't delve too much on that aspect yet. Though, thankfully making the trek to pow mecca (Japan) this coming winter, so will finally get the chance to ride it in its other strong element.
Also, any board I own I usually ride both on hill and in the park. Rode both in the park, the 54 Tranny Finder especially; the more fun and versatile of the two. They're pretty fun on jumps and quite boosty, to say the least. Esp on colder/slicker days, I 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 you'll also see in the edit below lol). Not really the ideal choice for that sort of riding, anyway so can't say much for that either.
Have since passed down the 54 T.Finder to my bro, but have replaced it with the 57 T.Finder + this summer. Excited to see how they compare/differ on snow.
Anyhow, here's a short little edit compiled from some spring hot laps while on my 54 T.Finder this past szn.