adhd
"I've been taking Concerta for about 8 years and it's helped my mood and productivity a lot.  I used to get a stronger focus benefit from it and Ritalin, so there are times I still feel unfocused.  But overall, it works well.  The one-a-day dose is great.  It doesn't keep me awake too late at night, unless I take it after 11 a.m..  I definitely notice the days I don't take it, either by choice or if I forget to get the prescription renewed.  The first day off it isn't bad, but after that I get really cranky.  So I like myself a lot better on it than off!  My wife does too.

It's not a miracle, but it definitely helps."