I second that and add : be sure to try several rebreather IRL first, way before you get yourself fixed on a unit. I'd say all rigs on the market are good, and all look good on paper, but they may not be right for you underwater. Choosing the wrong rebreather is time, money, and moral consuming.If you’re not doing 50 dives a year, it’s not realistic to think you’ll be able to keep the skills sharp enough.