As you may have picked up from our review of Beta 2, the Pocket Edition betas are not for the faint of heart. They are far buggier than the PC Snapshot builds, less polished, and they tend to crash. Thankfully since we wrote that review, two more beta builds have been released to beta testers everywhere. I've played around with Beta 3 and 4 for a few hours, and everything is noticeably better. There are far less bugs, and I haven't crashed once. Even though all the betas since Beta 1 have only had bug fixes, they are still fantastic updates from Beta 1.
If you have been eager to try the beats but scared of the bugs, I recommend you take the jump. But if you are still on the edge or can't use the betas, don't worry because it looks like Pocket Edition 0.8.0 is nearing completion.
Source: Twitter