Looking at the pictures and reviews, the Hoss seeder looks like a great rig, but at $160 for the seeder, then you have to have the wheel hoe to attach it to, it can get a little pricey unless you are planting a very large garden.
About 2 years ago I bought an Earthway seeder to rep;ace the older similar one I had. I don't remember the brand of my previous one, but it was very similar to the Earthway, but the Earthway had several improvements. The seed hopper is designed so it does a better job of feeding the seed when it gets to a low level than my old one did.
Picture from Amazon.com