I have been using a Boss CS-2 that I bought back in the mid 80's in my pro guitar days. I dug it out of the closet last year and have been using it on bass. I was OK with it, not thrilled. Recently it had started acting funny and not playing well with my other pedals. So I decided it was time to retire it and get a new compressor. I did a lot of research, and finally decided on the Xotic Effects SP Compressor. Bought it yesterday, and have been playing with it since. I really like it. Seems really transparent, more so than the old CS-2 was. And I can get a really good range of compression out of it. It looks simple, but is much more versatile than it appears. So far I am really happy, and it was only $132. Lots cheaper than most of the others I was considering.