The burton Guide gloves are everything you'd expect out of a top of the line snowboard glove. The insulation keeps the temperature regulated well, while wicking moisture. The Leather is soft and seems very durable and will probably last a few years of abuse. The gloves come with leather waterproofing for the leather, don't forget to put it on, also buy some from backcountry.com while you're at it. It's less than $10 and will last years.
Just like normal Burton gloves, the fit is small. I normally wear a size Large glove and I fit into the Burton XL's perfectly. If in doubt, go a size up with these.
My hands were a little on the cold side when the temp dipped to -15c. These aren't warm and toasty, but they'll do the job for most conditions.
The gloves fit well under the cuff and are a breeze to take on and off through the day. I ski with 2 kids, so I'm always taking my gloves off to help them.