I think my Steelcraft is the enigma. I love it because I walk to the shops a lot and I wanted to be able to flip the handle over so DD wasnt looking into the sun on the way home. It steers pretty well if you lock the front wheels (whichever way you have the handles, just lock the front wheels).

I also like that it folds in one action and you can do it in one motion. One trick though: the instructions onthe handle told me to press handle levers then step on the red lever. That is the WRONG way. You should step on the red one first, then do the handle ones. I wondered why I couldnt fold it for ages!!!

One or two complaints though: when you fold it the baby bumper bar thing that a toddler will hold onto, always rests on teh ground and gets really grotty and scuffed. Also, the wheels are quite small so although it is great for shopping centres and nice city footpaths, it is TERRIBLE on country roads/crappy uneven footpaths. The wheels really should be a bit larger, it can be like using a stroller in that way. And the shopping basket is not suited to holding much when the handles are in the newborn position. THe basket will rub on the wheels if you put anything heavyish in there.

All up I think it is great though and am so happy I got that one. It folds so small too. I know nothing about the Bertini ones so cant help compare there.