Bought the 50W earlier this year after having read the review on https://theguitarstand.net/boss-katana-50-mkii-a-comprehensive-review/ . Absolutely worth the money. Honestly, really hard to tell it's not a tube amp. Also, as others have mentioned, each of the effects lights can be pressed to changed to another type of that effect, with the lights changing color between red, yellow, and green.