i had one for a bit but sacrificed it for other midi options. for just sending out two channels of CV/gate from your computer, it’s great. dead simple. it’s a super easy build, too. sometimes you can find them for $50 (i think i sold mine for $40!).
one thing to note is it plays much nicer with macs than PCs. from the manual:
“The CVpal works optimally with iOS, OS X >= 10.6.3 or Linux kernel >= 2.6. On other operating systems, the messages might be delayed by up to 8ms, causing a very jittery timing!”