Thanks guys! Grabbed a pair, thought I'd give some initial thoughts - should note, I'm still pretty new to this and don't have too many gloves to compare to.
The leather smelled decent coming out of the box, but it's thin. The yellow leather is very wrinkled. Stitching is okay, there's one very little section at the base of the thumb that looks like it's come apart. The black leather of the split thumb is actually on top of the yellow with a little raised edge, which could be an issue for sparring.
Padding is good, fairly firm and felt good on the bag. Thumb position and fist felt fine. The lining is pretty loose and bunches around the fingers which is a bit annoying. I found the hand pocket roomy and the fingers tight with the lining, but I have small hands so they may fit tighter on most hands. The wrist was weird - it felt loose even when strapped as tight as I could get it, but I couldn't actually move my wrist back so it did its job.
All in all, okay gloves for 30$. I'm a little worried about the thumb for sparring, but I'll be using them for bag work for the near future. Time will tell how well they hold up, and I can update once they've seen more work.