Any thoughts on Kid's trailers?

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Looking at the following brands for a trailer for two small children:

1. Burley DLite

2. Chariot Carriers (Deluxe Corsaire 2 Child)

3. Winthur

All three of these will set me back something in the range of 550-600 Euro, and all three appear to be well made, comfortable and above all safe for the kids.

Does anyone have any models and can anyone comment on their pros and cons?

Thanks a million.