He’s also got a review at his site.
“In total, the Voice of Saturn Sequencer took me three nights to complete (about 12 hours altogether). If you have more experience in kit building than I do (which is to say “some”), I’m sure you’d be able to shave a few hours off that time.
This is the first sequencer I’ve owned (or used, for that matter), and as soon as I switched it on I immediately wanted to cobble together a second unit. Trust me, if I can build one of these, you can too.”