I don't dive with a pony, but I do dive doubles a lot. As far as redundant air, I have my buddy, and I don't dive more than once with anybody that wanders off. We maintain contact, that is just how I dive and insist anybody I dive with dives (at least why they are with me).
I isn't looked down on that I know of. What is laughed at is when people pay upwards and over $200 for things like the spare air. The problem there is not that they are diving with a redundant air supply, the problem is that they are doing so with no knowledge of what they are doing. They simply bought the hype and figure that it will save their life. Problem is that 6CF is not a whole lot if you get very deep.
I would suggest that if you are going to go through the trouble of buying and carrying a redundant air source then do a little research based on your type of diving and try to figure out how much air you are going to need to do a normal/safe ascent and any stops from the deepest that you will be diving with it. I, myself, would probably just clip on a al40 for myself, if I was to carry one. I have 5 or 6 of those standing around and I would rather have to much air than to little if I was carrying a redundant source. Also, they balance out nicely with my rig.
I isn't looked down on that I know of. What is laughed at is when people pay upwards and over $200 for things like the spare air. The problem there is not that they are diving with a redundant air supply, the problem is that they are doing so with no knowledge of what they are doing. They simply bought the hype and figure that it will save their life. Problem is that 6CF is not a whole lot if you get very deep.
I would suggest that if you are going to go through the trouble of buying and carrying a redundant air source then do a little research based on your type of diving and try to figure out how much air you are going to need to do a normal/safe ascent and any stops from the deepest that you will be diving with it. I, myself, would probably just clip on a al40 for myself, if I was to carry one. I have 5 or 6 of those standing around and I would rather have to much air than to little if I was carrying a redundant source. Also, they balance out nicely with my rig.