You will regret only if what you NEED is not in the phone or it does not perform to your expectation
So study the phone specs, features and see whether it has those stuffs that meet your NEEDS not your wants. there is no perfect smartphone including even iphone 4s that can meet everyone needs fully
Read at least two threads of this forum and view other users experiences, their problems, the happiness etc and you will have  a general idea about the phone performance and features. At least read page 1 the links to the various web reviews
Example , I read of users who immediately complained why the Note doesn't have LED notifications and they are unhappy over it - goes to show they never study the phone features before buying ??

As for me, I must say this is the best android smartphone I have purchased follow by the G Nexus n SGS II. It meets practically all my needs not 100 % and as I always said as long as it meets 80 % of my needs , it is good enough. Infact it meet more than 90 % of my needs