I test rode the CarryMe last weekend and came away disapointed. The bike had a lot of flex and felt kind of flimsy. I don't know but it was faster and safer than the A-Bike. I cannot recommend the A-Bike at all and find it dangerous to ride because of the super small wheel. The CarryMe is faster than the A-Bike and rolls better although it's not faster than the Strida.
What surprised me was the front wheel of the the CarryMe was not as nervous as the Strida. I think Strida should do something about the front fork to stabalize the ride but it's not really that much of a problem. If you can afford it, get the Strida.