The OTTO is a complete hardware and software solution, with synths, a sampler, effects, sequencers, and studio modules. The interface is modal, easy to use, simple, but most of all, it encourages experimentation. The graphics are quirky, and the workflow is minimal. Yes, the OTTO is heavily inspired by the OP-1, but it is not an OP-1 clone. If you want an OP-1 you can get it here.