I did some fairly extensive research into this, owing to my miniscule boot.
I liked the fact that it folded up so small, but when I actually went to see it at AGD, I found it flimsy and unbalanced and walked away without it. The handle also felt like it was about to fly off.
If you are still interested, you should know that there are two models, the smart cart, and the smart cart 2. The v2 has a better scorecard and ball holder near the handle.
I eventually decided on either a Powakaddy Micra 6000, or a Twinpac 3. The latter of which I bought and am very happy with, if it wasn't for the lax attitude of Powakaddy customer services when I first enquired about it... but that's another story.