The podxt is great if you need a lot for a low budget. I use it now but I can assure you're not getting a good tone with lousy speakers. And speakers cost. Very full tones if you listen to it through headphones though, so that's the waay to go if you're a bedroom jammer.
I must say the channels are very limited individually and for each sound you need to change "amp", not good if you're into complex music. Takes a lot of time to bridge the gap between parts if you need a very dense( yes not the best word) and musical transition.
For metal I think the podxt live is great when through good speakers or else your gain will mud up and you can only play nu-metal. The gain is very tight for high gain sounds, especially for such a low-cost unit.
However, it sucks for rock/blues to me. after tweaking for over a year, I've yet to get a very good rock sound out of it as all of the distortions are too noisy( a lot of treble, not background noise) so your rock will sound very messy.
Cleans are great as long as you're not into dynamics that much. The overdriven/compressed jazz tones are very nicely created on the AC-30 model. Personally I find some models totally useless despite crazy tweaking. So the boast about 30++ amp models and stuff is just crap, only a few will appeal to each of us.
dynamics are not there. It is as dynamic as you hear on mp3s. we all know an analog amp into speakers produces a much more 'real" sounding instrument. This is for all digital pedals I believe, not just podxt.
The main problem with this pedal, everything has a side effect. If you want to thicken your tone, add reverb and chorus, but your sound will become very clumsy. If you want metal, up the gain up the gate, but your sound either becomes totally sterile or too hard to handle for n00bs. If you want rock, lower the gain but you'd lose the crunch and get more mud. For all gainy tones, you'd probably wanna boost it with a tubescreamer(modelled) if you want to hear your notes.
Buy this if you're into covers and multi-tasking. Don't buy this if you're trying to "find your sound" cuz you're going nowhere staring at numbers with your headphones on.
Lastly, this thing cannot be heard on stage if you're using a keyboard amp. You still need a stack poweramp or direct-PA to be heard but still it doesn't cut through.
My advice: attractive at first but I say buy a small amp and collect pedals. Even my Blazer 158 sounds more organic. Go for it if you're into recording songs cuz it's awesome for that purpose.
hope this helps
gjkung