It's a pretty good app, but I had the advantage of getting in within the first couple days. Admittedly, if I had to wait more than a week or two, I would've deleted it by now. It has some snazzy UI tricks and adds some smart task-based stuff to your email, but nothing life-changing. I haven't experienced any slowdown yet – I'd love to see them double, even triple the acceptance rate. I would be fine with taking a speed hit if it meant the massive queue started to speed up.