I have the JJP-12 with HH. If you are looking to save space and money, it's a great way to go. If you are looking for something solid and precise, I would not recommend it. The jointer tables are designed to be lightweight and make the change over easy. Mine were far from flat to begin with and they do not stay true.
That said, it is good enough for 98% of what most people probably use it for. And I love the HH. Change over is very quick.
Dust collection is not great but some mods can help.