Despite being several years since it was first released, this beat box is still the best out there for the guitarist or bassist who likes to jam. There is a large 400 library of preset patterns to start with. These can be tinkered with and then linked together in blocks to create a song.The built in guitar and bass effects are great. No need to buy a bunch of foot pedals. Each effect is customizable and has classic presets too. You can play tones to match with your grooves. The other cool feature is adding human like variability to the grooves and a rapid composer mode. The price is a bit steep but it is jammed packed with features. Highly recommended.