So I have finally decided and ordered the BJCMGT. Now I have to think about car seats, so I went on the Baby Jogger website to check what was compatible, and the table there says it is just the Kiddy Evolution Pro. In contrast, the regular BJCM has other options such as MaxiCosi Pebble and Cabriofix, BeSafe Izigo etc.
To add to the confusion, when I was looking at the GT version in John Lewis, the sales assistant put the MaxiCosi adaptors on, and then put the Cabriofix seat on that which seemed to fit fine, but she couldn't get the Pebble on for some reason. So now I'm totally confused, and perhaps I should ring Baby Jogger. But I wondered what car seat people on here are using with BJCMGT? I'm not keen on the Kiddy Evolution Pro as I can't find any reviews on it.