I used Sony Vegas for quite a while, but it got very unstable after some time. So unstable in fact, that it was barely possible to use it anymore, and editing would take me 5-6 times longer only due to it crashing.
Because of this, I got myself Adobe Premiere, which is loads better for me. Unfortunately though, there are a few features I miss from Sony Vegas, like the insanely easy crossfade thing, and different fading options. Have yet to find that in Premiere.
Overall though, I'm starting to like Premiere more than Vegas, even though I'm still very new to Premiere and have lots to learn about it still.