hi sa, I do have a P&T but it's not a sport, it's oooolllllllddddddddd - got it when pg with ds2, and he's now 7! And tbh I think my older model is better than the sport - hasn't got as many 'features' but seems a lot sturdier, roomier, well, I look at the new ones and prefer my old one. Amazingly as have got pushchair addiction tendancies . I saw the old one that I have (called kiwi explorer) for only £30 or so on e bay!
Still, if looking at the new sport, can't comment in detail, as never used, but the general idea of the P&T, I love my pushchair. It's the best one I've had. I still use it with the doubles kit, cos the bottom bunk is just so useful for 'stuff'. It's light, easy to push one handed, even with 2 toddlers in, and much much better (imo & e) than side-by-side.
They are releasing and all singing all dancing new model next month btw called the Vibe, which, afaik can fold even with doubles kit on, is supere dooper lightweight etc etc. but mega £
see here
and Q&A about it here