I have had all kinds of guitar amp and effects equipment over the years (Marshall, Roland, Peavey, ADA, etc.) and I am really impressed with the Line6 POD!
I no longer perform live, but am doing a lot of recording in my home digital recording studio. I needed a DI box and the Line6 POD fit the bill and then some.
This unit has a huge variety of sounds! I am a big fan of the warm tube tone (can't stand solid state), and the tones I can crank out of the POD are good. It comes close to the real thing, but does realistically fall short.
For the $$$ and the features, you cannot go wrong with this unit. If you have a PC with MIDI capability, you can customize your sound even further!