Harley Benton Double Jammer

It allows you to easily control your loops with distinct switches for drums and guitar.

Although I feel its missing the 9v battery option and I would love if I had an extra switch because sometimes I like to add keyboard or microphone sequences.

Has lots of drum sequences and allows to control the volume easily.
Although it would be nice if somehow there was a way to adjust the drums speed after we already created the loop

This thing has caught my eye with respect to very handy features. So I bit the bullet. Honestly I stil haven't figured out how to use the damn thing - tap tempo on drum part. only two switches for multiple functions to me is really really confusing. The manual provided does not help either. God forbid I want to change the tempo on the rhythm part...I have a feeling that each time I do it is pure luck :-).
Quality wise, seems durable enough, have not had any problems.

I wanted something like Ditto but with some rythms to play along and help you to play evenly. This works perfect and what is the most important is very easy and intuitive to operate. No memory banks, slots, deep menus, tiny buttons ect. Just rythms which synchronise with your loops. Loops quality for my ear are as good as Ditto. Rythms quality is also very good. It makes me play more on guitar and having fun with it, and that's is what it's all about.

Manual is basic. No info how to delete all loops -the keep on coming back.
Loops do not play immediately - unclear when they start playing.

I have been playing with this every day since I got it last week. There is a huge variety of drum beats for most musical styles, the looper has a huge recording time and overdubbing is a joy. The sync functionality is brilliant. Tone controls are fantastically useful and the overall sound is clean.