There's a group of quilters in my area who are all longarm owners. We're all friends and go on retreats together. I've been picking their brains and looking at their machines for several years now, and have put myself in the market to purchase a longarm by the end of the year. I'm 90% sure I'm going to purchase an Innova.
At least 3 of the quilters in my group have moved over to Innova from their original machines in the last 2 years, and they're all very pleased. Innova has very good 24/7 tech support.
I've heard rumblings about Gammill that make me leery. A couple of years ago their largest US dealer pulled every single machine they had in stock and stashed them in a warehouse, then started selling Innovas instead. My limited understanding is that Gammill stopped supporting warranty work done by the dealers.