I compared this unit with other models that were similarly priced. I chose it over the Fostex and Korg units that are similar (four track, digital, two inputs).
I would buy the Zoom again. It could have more than two inputs and a better metronome.
My least favorite aspect would be switching between songs. It takes more steps than I like.
My favorite aspect is that I can record digitally for the price.
Model Year: 2002
Price: $250.00 (new)
Where Obtained: Musician's Friend
The MRS4 has a menu-type control system. Instead of having one button for each function, you press a few buttons repeatedly to find the function you need.
I use it for recording either my solo work or work with my band. Recording is easy and requires just a few steps. Overdubbing is very easy.
The Zoom MRS4 has good chorus, reverb and delay effects. Nothing extreme, but they sound good.
I have not found it lacking in any important category. It does have an annoying (sounding) metronome that only works while you are recording. A simple click would be better. It also allows two inputs at a time. You cannot use more than two mikes at once.
The sound quality is MP3 quality.
With a little practice, it is easy to use. If you are on a budget and like portability, this is a really good device.
I have not used it for gigging, but it seems to be well made and sturdy. It isn't made of cheap materials, and fits easily into a small box. There are no parts that stick out and might get broken off.
I have had good experiences with Zoom products in the past.