Read a lot about the issues, but between the lines i also read some enthusiastic reports.
Fore app performance delete your timeline, and it will work seemingly again(tip @Caseda ).
If its worth it, depends. Hobbywise for me the answer is yes. And i like to have a spare Homey. Becauses when it crashes definitely, you will wonder at that moment, that a live without Homey is quite different. My life without Homey.
Will it really be worthwhile. I doubt it, because €430,- (with ethernet) is a lot of money when your Homey does its job well.
But just my two cents.