I'm pretty unimpressed: this is stupid expensive for rather little.
Tangible Waves's AE Modular format is particularly easy for hobbyists to develop on: it's strictly 0-5V, with simple power requirements, etc., and it's very cheap. For a number of years Tangible Waves has sold the BRAEDBOARD module, which is more or less the same thing as Erica Synths's product, but costs $30. And Tangible Waves goes further: they sell a PCB prototyping module kit for $20, called DIY, to take your design one step further.