I upgraded to 10 a while back and love it but have found some drawbacks. Main one is being able to use my SonicView Global VPN connection. I do taxes at home for a local CPA firm here and when I went to log in the first time this year it gave me some errors I wasn't familiar with. After a lot of searching and finally a call to a tech we got it going. He said they have had a lot of problems with certain programs after upgrading to 10. Usually nothing that can't be fixed but was a bit of a PITA for a couple of days!!