A valid concern. This one happens to nail the "love letter" that they promised in their Kickstarter, so I do recommend it with aplomb. They also were very responsive when I had some issues with the performance, and fixed them within a day. Maybe give it a try (or not), but this one did a great job.
Now I will, too.
I see a dock on the Nintendo store. Just found a link, says it is out of stock. It looks like maybe it was a temporary issue? Dunno. https://store.nintendo.com/...