I have 3 children one age 6, one age 2 and one age 8 months and live in a village with narrow paths so i really needed a tandem pushchair to do the school run.
I looked at several and chose the Powertwin as i wasnt keen on the Phil & Teds as from my experience with the older 2 children they really enjoyed being able to look round and take in the views which i really felt they couldnt do in the low slung rear seat of the Phil & Teds. i did borrow a Phil & Teds initially using the cocoon but have to confess it felt a little like putting him a box and shoving him in a cupboard plus i was paranoid about kicking his head as i walked up the road!!
I was also keen to find a tandem that allowed me to use it as a travel system as i had used them with the other 2 boys and found it so much more convienient particuarly as they have all seemed to sleep about 8.30 ish which coincided with the school run so it enables me to transfer baby in and out of the house or car and to the pushchair without waking him or him getting cold.
The rebel car set is compact and light - it appears much smaller than many others on the market which must be very cumbersome to carry and as i have the Pro model the seat simply attatches direct to the chasis without the need for additional clips as on the orignal powertwin. The handle of the pushchair is alterable at the push of a button - very useful when you are 5'2" and hubby is over 6'!
The pushchair is very easy to manouvere and virtually everything comes off for cleaning. It has a good size shopping basket and the raincover is great as it has individual windows that you can open - very handy when you have a stroppy 2 year old who doesnt like being undercover! The buggy is also easy to open and close and fits into most cars as you can take the wheels off if you need too (very easy to take them off and replace them)
Downside.....the oldest child MUST sit at the front or it can overbalance (mine never has to be fair) but you need to be careful if the oldest gets out and you only have the little one in the back - although i think this is an issue with all tandems. I stick my change bag in the front if my middle one gets out, you also need to be aware of the balance if you go up a kerb as you have the weight on the front wheel but again this is an issue with all 3 wheelers. The only other thing is the hood of the front seat is quite low - my 2 year old boy is not very tall but his head is nearly touching it so we tend to use it without the hood on (both hoods can be taken off)
Other than that I love mine worth every penny of the £500 it cost us, people always remark on it particularly when i have it in travel system mode. If you need a buggy for 2 kids to use simultaneously then i cant think you could find better especially if you can pick one up secondhand as unless peole have twins they probably only use them for 18 months or so.