I have used it but am not currently. I found it to be pretty good, not to laggy, but did get some FC's more than I would like. It uses alot more resources to operate so that can cause some issues. However, it works better on my maxx than any other phone I've used it on. I don't care for the notification bar and dock always showing as there is no option to hide them. A better option is go launcher or possibly Zeam. I like the go launcher functionality and usually use it, but Zeam has the smallest footprint and is wicked fast. The biggest problem with mobile shell is the seemingly lack of support from the dev. It could use some work and tweaking. A trial longer than 15 min is needed to really check it out. Great eye candy, but I have to give it a thumbs down overall. YMMV of course.