We've had our Magma on our boat for the past 20 years. I agree with KG that when, not if, the winds pipe up in the afternoon, it can be difficult to BBQ. In Northern California, where I lived from 1978 to 2016, it also got cold in the p.m.! But that said, we used it a lot. Even more when we took our summer jaunts up to The Delta. Now that we're here in delightful British Columbia, the afternoon winds are not that common on a daily basis. When it gets warm here it is quite nice cooking in the cockpit.
When we had our C22 from 1983 to 1987, we'd trailer the boat up to Clear Lake, sail all day and anchor out. Back then all we had was a small Hibatchi charcoal grill that we'd place on a piece of plywood across the cockpit seats, the plywood was also used to make the large bed down below with the table dropped - a standard C22 home improvement.
We brought the hibatchi to our C25 from 1987 to 1998, sailing SF Bay and The Delta.
Not having charcoal is great. One learns the ways of the Magma when cooking - it does burn hot even on low. I find it great for steaks and my son is a master at chicken on it.
I find the need to clean out the regulator periodically. A fine but solid wire does the trick.
Your boat, your choice.
I would have loved to have a Magma on my C22, but we didn't have a stern pushpit on that boat.
Gene Neill hooked me to the one burner Coleman
Because CNG is not available here in BC, we, too bought a single burner butane stove before we left SF in August 2016. Still going strong.