SOS browser has gotten a lot better IMHO when it comes to UI in the latest update. But yes, it's still slow to launch and it has severe bugs like not being able to zoom on certain pages or even tap links on said pages (the whole page just seems to freeze). A little tweaking in about:config makes it faster to load pages though, but yes, too buggy for general use. Which is why I've used Webcat in the beginning and am using WebPirate ever since it was released. Esp. after setting WebPirate as the default browser I'm even more happy with it than I already was. Sure, it's not perfect but for a normal end-user like me, it's more than enough for casual web browsing (which is what I do no matter what browser I'm in anyway)