On first impressions its hard to believe that Rocket could be anything other than a toy - it's really tiny even considering it’s a hybrid digital/analogue synth, and the interface isn't exactly cluttered with controls.
However, the build quality is reassuringly excellent, which is surprising considering the unit’s low price and its light weight. The knobs have decent build quality and rotate smoothly, and the switches are satisfyingly chunky. Overall the form is a delight, and the included Quickstart instruction card is refreshingly unfussy - you just plug in USB or MIDI input, connect the mono audio out and you’re ready to roll!
Once you’re up and running it’s time to experiment, starting with the synths oscillator. Despite only having three knobs and a pulse/sawtooth switch, this isn't as straightforward as you might imagine. The Wave and Tune knobs give access to a huge range of different sounds including the unison detune, chords and hard sync we already mentioned, and - while reading the downloadable manual is advisable to get the most from it - it's certainly possible to get some fantastic sounds out of it without really fully understanding what's going on.
The other parts of the synth are relatively straightforward and as well as the glorious multimode resonant analogue filter you get a simplistic DSR envelope where the Sustain and Release are controlled with on/off switches, an LFO/arpeggiator and a Boost button that saturates the signal after the filer.