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.
The Erica unit has power supply, an oscillator, an amplifier, a gate, a headphone amplifier wired to a jack, the full gamut of eurorack voltages, pots and switches wired and ready to go.
The product you're comparing it to is lovely and cheap and probably what I would buy, but the Erica device is much better for an electronics beginner-- it has a much lower barrier to get from tinkering to making the beeps and the boops.
Point taken, but you can put together 2 ae vcas, a vco, power supply and headphone amp plus this module for less than 2/3 the cost of this thing. And they're optional. It's still much too expensive imho.
While Tangible Waves' BRAEDBOARD is cheaper, the advantage of this thing is that it's compatible with Eurorack, which someone who is interested in learning how to prototype modules is likely to already have a lot of.
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.
https://www.tangiblewaves.com/store/p92/BRAEDBOARD.html
https://www.tangiblewaves.com/store/p91/DIY_kit.html