Yeah I use it. Mainly when it's indicated in the score, like in some Chopin Nocturnes. You can add it at other times as well of course, but I like to follow the score. Playing Debussy for example needs quite some soft pedal (or many people use the soft pedal while playing Debusssy).
i use it heaps! but only for real fast songs! (such as moonlight sonata 3rd movement) My piano keys are quite difficult to press down so when I'm playing fast songs it's a necessity for me =p, but i don't use it when im playing practice books like Czerny, Bach and stuff like that, because they're practice songs lol your not gonna perform them at Carnegire Hall or something like that.
! You know, if you practise like that you will never come into Carnegie Hall
. That's called cheating. Either buy a better piano or practise good on a bad piano. Cheating is the worst way and can worsen your technique...