Fender introduced the Mustang I (20 Watt 1x8), Mustang II (40 watt 1x12), and Mustang III (100 watt 1x12). At Winter NAMM the Mustang IV (150 watt 2x12) and Mustang V (150 Watt Head) and 4x12 Cab. I've heard many people reviewing this online and one guy (Rob Chappers from the UK) did a best modeling amp comparison. He tested Mustang II, Line 6 Spider 30, VOX VT30, and the Roland Cube 20XL. Other than the Roland besting the Mustang in high gain (metal) settings, the Mustang beat all the competition in regards to looks, tone, weight, features, and cost. So I decided to try a Mustang II today. I used a Gibson Les Paul Faded (Burstbucker Pro's sound awesome). I must say it was a great sounding amp at low and higer volumes. I was impressed with its clean and crunch tones. (I don't play metal, so I didn't push the high gain stuff). For the money ($99 to $499 US), I think its a great practice amp. I'd recommend it to anyone, but don't take my word for it. Wait until Robert demo's one or more for us to listen to.