They are made by hand, so the time frame they accept orders can get a little tight. Last time (started on the 27th of Sept.) they were sold out almost immediately, it seems. I kind of stalked the page a couple of days...
According to the above page they'll be accepting new orders again from around the middle of October.
It is a bit tricky to use on the count of being extremely sensitive to noise and misreadings, but it can be used in a way that corresponds to more expensive models. Their manual pages are excellent (albeit in Japanese).
