1) This is the ONLY analogue Kick producer who understands the amplitude envelope right: it has Sustain parameter (called Hold here). Without Sustain your kick will never sound loud enougth comparing to all the other house/techno/whetever tracks DJs play. I tryed many analogue kicks: Jomox MBase 01, MBase 11, MFB Tanzbar, Korg Volca Kick, and they all lack Sustain. I tryed to compress them with inexpencieve compressors (under 400€, SPL Transient Designer, FMR Audio RNC 1773, Symetrix 501, Origin Effects Cali76 Bass Compressor) -- and never could get desired result -- all of the compressors can't work with low frequencies and produce audible artifacts). The only possibility was to record it and apply digital compressors/envelop shapers - wich makes no sense, you coud get better resuts faster with digital kick synths like Kick2.
Additionally, Rythm has many kick machines, not just one, all with unique parameters.
2) Very easy to understand/remember interface and shorcuts. Logical, fast, intuitive. Manual is huge, but you can start just by reading few pages and then open deeper possibilities later.
3) Lost yourself with delay with applyed LFO - sounds so evolving and never boring.
4) Perfect tool for contemporary Techno. Period. Add few synths or another sampler and this is all you need.
5) Hi-hats/shakers made by noise generator sound amazing, sweet, lush.
6) Can use it with outer sequenecer (DAW) - no setting needed to change, it just works.
7) Beware that if you layer your analogue Kick with sample - you cannot apply HPF to sample only (only for sum of both). Solution is to put sample on another track (but this will eat you another track), or prepare filtered sample in computer (never know exactly the cut off frequency).
7) Cost every penny. Bravo, Elektron!