I don't know anyone who uses Sound Forge these days - it was the go-to editing tool a decade or so back, if I remember correctly, but for musical purposes I would have thought one of the more mainstream choices would be better. But 30 days is long enough, providing you can make the time to use it. It's hard to make an assessment without comparing it to something else, though. For years I was a Cakewalk/Sonar guy, and I was very productive with it, while learning to work around its weaknesses. But recently I felt the weaknesses were too much, changed DAWs, and have been amazed at the increase in my productivity.
Example 1: editing drum performances in Sonar. They posted an official blog entry (or 3) about it that showed how laborious the task is - yet forum readers loved it because previously they thought it was basically impossible! Compare that to Reaper, where you download one set of input macros and then the whole task can be summed up in 2 lines of text - because it's literally that simple.
Example 2: cutting/pasting/moving data in Sonar. Sonar is, these days, aimed at the recording engineer. They expect a user to record a musician playing a take through an entire track, then they tweak it, and the work is finished. The actual process of songwriting has been largely sidelined, which means that anyone who tries to use Sonar as a scratch pad, writing pieces and then shuffling them around in the track view, runs into a ton of problems - unwanted crossfades, superfluous take lanes created, the lasso not always picking up all the bits you want to move, etc. They know the situation is bad so they promised ripple editing back in June as a way of being able to move things about reliably. 5 monthly updates later, still no sign of ripple editing or any fixes to the editing situation. Meanwhile, I moved over to Studio One 3 (not the catchiest name) where the Arranger Track lets me move things so easily I am literally 10x more efficient at trying out new arrangements than I was with Sonar. Even when they add ripple editing, it won't compare to that. But if I'd never tried Studio One, I could have been grateful for the fix, without realising how much better things could be.