Follow the link that Jordan posted about how to use the reticle. I can say as a former HARD CORE (there isn't a person who has ever hated mils as much as I did) moa user, regardless of people's backgrounds they pick up and use mils way quicker. Regardless of what you're "comfortable" with, any thing with a base ten easier to remember and use.
And again ill go against the grain, with a well designed reticle FFP has no downsides. Now a lot of reticles aren't well designed however I and everyone I shoot with, use it all the time on less than max power and I want the reticle to be usable and have the same subtention regardless. The reticle isn't for ranging, and usually not for holding elevation. It's for holding wind. Lots of guys say that they never shoot in less than max magnification, but there are lots of times it makes sense.
Let's look at SFP vs FFP a bit different. When we adjust the power on a SFP scope the relationship between reticle and target change. With a FFP it remains the same. Following the logic that if your shooting long enough range to need to use the reticle, then you'll have it at the highest power- would anyone like it if their adjustment values on the turrets changed depending on maginification? I mean it wouldn't matter because if it's far enough away that you need to dial, then it's far enough away that you'll have it at the highest magnification..... a stretch, but not much.