I bought this to use for recording performances (e.g. my kids) and as a microphone/interface for recording at home. It did both jobs well. I have used it as a standalone multi-track, but it is a bit fiddly. It takes a lot of clicking around to set levels etc and setting file names takes a while. Mine seems to have stopped working with batteries, but I still use it to record band practice by plugging it in.
Menu is a pain in the butt. Screen and text is too hard to read. Setting up for recording is a hassle. In-built mics overload quite easily. Only records about an hour of 96/24 before starting a new file.
For recording live shows its rubbish.
Use mine mostly as a PC microphone now.
Was probably awesome when it came out but technology has overtaken it. Buy if very cheap. Otherwise avoid.