I guess it depends on how are you planning to use the phone with the installed W10M.
If you are going to use it for work, then I am afraid it is not going to do much help. Email notifications don't work, even SMS notifications stopped working. W10M is j just too unreliable to be used as a work phone right now, at least on my Lumia 930.
Other than that, I believe the system is absolutely fine for light use (internet, YouTube videos, music, Facebook, games, etc.). Just don't expect it to be 100% perfect, it still has some flaws and bugs.