I just got a YHM Fatcat through Silencer Shop and I was able to do much of what I needed to do through a local gunshot that had a kiosk. Order placed on 4/15. Silencer arrived at my local shop on 4/24. I got my email from ATF on 4/28, but my shop is closed on Mondays. Picked it up 4/29.
All in all, I've heard of things happening faster, but I'm not complaining. I think I'll likely stick with Silencer Shop for future purchases. They made it as painless as I'd imagine it could be.