I personally don't like the stuff... I wasted a bunch of money trying to get it work on my tank... other people had success with it though. But I didn't like that its expensive, hard to use and hard to get it to seal completely. I had great success with Sanitred... it goes on like paint and stays flexible.
Yeah, outdoor inground ponds seem to be its forte since any leaks are no big deal and are invisible. Indoors, when every pinhole leak is a giant puddle, different story.