Pokey1,
The Microtrack is a great little recorder. It has some minor problems, but many of them have been fixed already and M-Audio is a very responsive company. I used mine to record my son's Ska band with the included mic, and it turned out great. The only issue is that it is easy to overload it with the supplied mic and very loud music. I've used it a number of times, and never had any problems. One of the reasons for that is that I read everything I could about it and was able to avoid some of the problems mentioned by upgrading the firmware from the M-Audio website.
If you want really high quality recordings, then you would want to get some different mics, and an external preamp. You can hear a recording of a high school jazz band that I did with it in this thread.
http://taperssection.com/index.php?topic=55810.0 What type of music do you want to record?
-- Martin