Looking back, it was still pretty rough around the edges. But it worked as a minimum-viable product, and I wasn't going to put off its release any longer. So I made it public and started getting people to sign up, initially at a discounted rate for my early-access folks who heard about it through my personal Facebook, then raised to the current price of $5/month later in May.
This was also the first major product that I've built—and actually finished—entirely by myself. I have a whole "product graveyard" on my computer, with all of the projects that I started (and sometimes spent years on) but never released. It felt good to actually put something out into the wild! (Scary at first, but good.)