Agreed. I used to use Command T religiously, but I move machines frequently due to the nature of my work and was spending more time trying to get it and its dependencies working on the variety of machines that I use than I was actually, you know, coding.

Granted, Ctrl-P is much slower than Command-T. Won't deny it. But carefully excluding all .git, virtualenv (for python) and similar folders in my .vimrc, along with making sure I cd into a directory a little closer to my code makes it almost as quick for me. And it just works, which is invaluable in my book.