Loved mine. Came with a K120. Very loud, and that's why I sold it. Even at low volume.
There's a lot of Jerry-ness in a Mk1. They don't have reverb (well at least mine didn't). I think I bought mine for $800 and sold it for $950 +/-.
And when you can crank it a bit it'll deliver.
My opinion is that if you can deal with the lack of reverb, and get a JBL in it...you'll be very happy.