Not really Ryco.
First, if you do decide to solo someday you will probably not want to restrict yourself to less than 50ft forever. So, when you do decide to go deeper you will wind up repurchasing a proper redundant air source. If you can return it, consider doing so, and just buy a proper pony once.
Second, after awhile you may find that for dives less than 50ft you won't want a redundant airsource. My plan at those depths is just to CESA. Redundancy really comes into play (for me) on dives below a depth that I feel I can comfortably CESA from. That's just my opinion though, everybody has to make their own decisions about that.
I'm not rabidly anti spareair. I just think it is a purchase that has a very limited application that most divers will probably grow out of rather quickly. Then it's just stuck on a shelf or sold on ebay at a loss. A good sized pony will last you throughout your diving career and can even become a deco/O2 bottle if you get into tech, caving etc...
The big selling feature for spare air is that it is small and easy to carry. You will find however, that most people that use proper ponies don't have an issue with slinging or mounting them. It is a non issue. As well the reg set from your pony can be used in a pinch if you need to replace a 1st or 2nd stage on a dive. You may also want to check if the shops in your area will service the spareair reg set and whether you can get hydros done on it.
