This is my review of Line 6 POD HD300 Look and feel: To be honest one of the reason why I bought this unit is how it looks. It's pretty heavy-duty: no plastic parts (expect knobs). Nice filing of switches, great feel of a vol/wah pedal. This is definitely what I've been looking for. I like silver metal switches because they makes you feel so pro for only about 300$. Unit can be plugged into amp or directly into PA in stereo mode. It has headphones output and output for DT-50. Obviously guitar input and USB port which allows you modyfi patches on HD300 with dedicated editor, upload and backup patches on your computer and also use HD300 as a soundcard for recording you guitar. I don't like AC adapter - I would like to have solution similar for this what I can find in my amp. Demo of HD300 used as a soundcard + amp modeler. Amp Modelling: Line 6 decided to reduce number of amp models. Instead of 100 poor quality models they put here great modelled 16amps (Fender Twin Reverb, Hiway 100 Custom, Super O, Gibtone 185, Fender Tweed Bassman, Fender Blackface Deluxe Reverb, Divide 9/15, Phd Motorway, Vox AC-15, Vox AC-30, Marshall JTM-45, Brit P-75, Marshall JCM-800, Bogner Uberschall, Mesa/Boogie Dual Rectifier, Engl Fireball 100) with 16 different cabs matching each head and 7 mics (Shure SM57 On Axis, Shure SM57 Off Axis, Sennheiser MD 409, Sennheiser MD 421, Coles 4038, Royer 121, Neumann U 67, Neumann U 87). This gives you 896 combinations, pretty cool. Amps sounds really good. I used Hd300 with headphones and with amplifier. Headphones gives you nice detailed full sound. I never own valve amp (yet) so I have no comparison but for me they sound really good. When I'm using my amp (Marshall AVT150H + Randall RX412) I plugg HD300 directly into return of a effect loop so I use only power-amp od Marshall. For me this is the best configuration and sound really good. I would like to hear this on some Celestion v30 - it should sound great! I compared hi-gain from my head with emulated Mesa and the second one kick ass. My favourite amps are Vox AC-30 for clean, Brit P-75 for crunch and Mesa/Boogie Dual Rectifier for hi-gain/solo. Demo of HD300 recorded in "live environment" - plugged into poweramp of a guitr amp head and the to a cab. Effects: HD300 is loaded with effects from M9/M13 and this should be the end of a description. All effects sound really good. When I play using HD300 my amp I use TS emulation for Hi-gain models, some flange and delay for solos and it sound great. One of a problems about HD300 is that you can use effects only in some specific way - you can't i.e. use overdrive pedal with compressor or whammy because all this effects belongs to FX1 slot. This is what I don't like about HD300. You can avoid this frustration buying HD500 which costs 500$ (BTW HD400 costs 400$ - strange coincidence). Overall Rating: I like HD300. I like how it looks I like how it sounds. But if I would have 500$ I would buy HD500 - it's more complex solution.