Hi mate
I have the brodex eco trolley, i find it a nice trolley to use, it has a 100psi pump on it aswell as a controller.
It holds 50L which is great,
I normally fill it to about half way, before i put it in the van, and just top up with jerry cans, as the weight of 50L + trolley is very heavy!
It has a single hand which come off by a little bolt, it can be a bit fiddly at first but i find it ok,
i would say that it isnt the most compact trolley, but i think it is one of the best quality.