Umarex Gauntlet SL25 or 22...?

Anyone get the new SL model in .22 or .25?
Haven't seen any reviews on these but I honestly believe I can get much more "in depth" info here.
Got my G2 .25 in February and loved it!
JTS 29.63 pellets moving at 885fps grouping about .5" @ 50 yds.
The bolt was extremely sticky straight out of the box and would actually lock up from time to time. I was hoping to break it in better but it got to the point where I was spending most of my shooting time trying to free the bolt mechanism. At the end of March, I sent it in to UX for warranty work. Hadn't heard anything from them and since we are now in the month of May I called them. I was informed by them that they were just gonna send me a new gun and it was taking so long because they didn't have any replacements. I asked if there was a possibility that I'd get the updated SL and he said it was a possibility but don't bet on it. The rep made it clear that I would get whatever came in, SL or not. (At this point I just want it replaced with something that works.)
Anyway, my curiosity about the new model has got me wondering.
Your input here is valuable.
Thanks