I paid for it as well - the trial period is extremely generous. The # of days you can use it isn't contiguous, so you could actually have the program for a few months before you use up the trial period (which is what I did - I'd use it for one day to transfer a shitload of stuff, then take a few weeks to convert it, and start all over again).
The only thing I dislike about SS is that you can't zoom down to the sample level - I'm still using SoundEdit 16 for fixing pops and clicks but might give Audacity a try for that...
--Dave