We have the P&T and just bought a doubles kit for #2. DD will be 3 when this one comes along and she still uses the pram on a regular basis. We got the P&T originally because it is a good pram and it does have the option of the double kit. Now that #2 is on the way I am glad we did, as we just had to get the extra seat to covert it.

When DD decides to stop using the pram we can just take the second seat off and it's back to a normal pram. My friend has the same pram and she still used it when her eldest was up to 5 years as she would often get tired walking and want to sit in the pram so I expect to use the double for a while yet.