I got a pair of the Pow Tanto this season b/c I found it on sale at SnoCon pre-season, and I needed an underglove. I personally wouldn't buy any of those over gauntlet style ones.
I'm really happy with the decision as it gives me a little extra warmth like a mitten while retaining the dexterity of my trigger finger. They also had that Celtek one which is almost idential in eveyr way, but I chose the Pow as it fit better. So far no problems with waterproofness, but then again I've only used them a dozen times or so. My only complaint is it isn't warm enough on the really cold days, even though I wear a liner gloves (not included). I'd love to try a pair of their Sniper Trigger gloves as I do prefer Gore-tex for our PNW conditions and my sidecountry excursions, so hopefully I can find a good deal somewhere...
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
15 Now Drive . 14 Burton Genesis
14 Flow Hylite