Don't Install It If You Hate Dealing with Problems
We're actually hearing some pretty good things about the iOS 9.3.3 beta's performance but there are still bugs and problems and the potential for more to emerge as we progress through the beta process.
Developers have already found some issues with the iOS 9.3.3 beta and we expect more to emerge as we push away from the release date. There will be bugs and there's always the potential for it to ruin your battery, connections and more.
If you don't want to spend time dealing with these problems (some of them will require a fix from Apple itself), avoid the iOS 9.3.3 beta. Or, at the very least, wait for Apple to improve the iOS 9.3.3 update with future beta releases. If there are any.