I am on Luvox and have had a great experience with it. I am switching to Prozac only because it is more known to my OBGYN and I will be trying to conceive soon.
As for Luvox, I find that Luvox does make me tired, drowsy but I think all SSRI's do. I do have a lower sex drive and it is harder for me to have orgasim during sex, although it does happen but just takes a longer time. (Hey just makes my hubby work a little harder

). I did not gain weight from Luvox. I think most of the SSRI's have the same side effecs. Luvox is really only for OCD and not for other disorders as per my psychiatrist. It does not help with other anxiety issues or depression.
Good Luck!