Value wise, I'd say it beats the ASM hands down simply because it can be run external without leaks. Some may say the ball valve isn't fine enough to control water level, but I haven't had any issues at all with it. It seems "loose" enough to make fine adjustments, unlike most ball valves I've had on my plumbing.
It took me a little while to get it all figured out, and I'm still fine tuning, but I'm satisfied with my 2000. Most of the guys posting in this thread all have the 3000.
Just my .02 cents!
Daniel