Anybody own one? How do you like it?

I have a bunch of plywood pieces to finis with a water base poly varnish
and it looks like this little sprayer would be ideal for the project.
Easy cleanup and storage of varnish and thinner in ordinary mason jars
is particularly appealing. So the question is, does the thing actually
work well enough to justify the $50 it's going to cost?

I tried one and promptly returned it after using it once. What I didn't like
about it is that it has a fixed spray pattern and generates tons of
overspray. It has it's uses and it's probably worth the money, though for
the same amount or slightly more, you can get a real spray gun which would
be more versatile, but it'll probably require a larger air compressor.

If you're spraying water-based finishes don't worry too much about cleanup.
All you need to do is pour out the finish, rinse the cup, and run some water
through. The mason jar storage of the critter is appealing but bear in mind
this advantage is negated if you're spraying clearcoats as it's a good idea
to run the finish through a filter and pour into a clean jar before you
spray.