When I was looking for a small practice amp I looked at all of them and decided on the Yamaha. Then I had to decide on the THR10, the THR10C, or the THR10X. I went with the THR10 and used this amp for many years. I recently looked into the THR30II model. After many reviews and Youtube videos I decided to purchase one. I also purchased the THR carry bag. This amp did not disappoint me. This amp is a little monster. The amp combines the THR10, THR10C, and the THR10X. It has a built in battery so you don't have to keep the cord plugged in. It also has a built in wireless receiver for cable free playing. There is an app where you can change the settings. It also has bluetooth. I am very happy with this amp.