Once I put these on my semi-acoustic, I was able to get a very full, fresh sound from it, more so than other strings I've tried. This only lasted for a couple days though. The frets eventually shredded into the strings after a few days of use, especially the G string, meaning the sound dulls faster than they should.
I'd recommend these to people who change their strings right before playing live. That's when their potential lies. Otherwise go for coated strings, which have a better lifespan.