While I give Netgadgets full marks for their quick delivery and price, I can't see that I will have any use for this product as I can't get a smooth shot while using the dolly over even the smoothest lino floors. The wheels are hard, with no give, and the whole dolly and tripod shake as soon as I begin to move them.
The dolly is easy and convenient to set up, pack away and attach to tripods of any size, but none of this is any use to me if I can't get a steady tracking shot while using it.
There's a review on here that describes the dolly working well over gravel and rough surfaces... but I found that rough surfaces only exacerbated the problem, and over gravel there just wasn't a chance. The thing barely even moved when I tried - it kept getting stuck.
Perhaps this dolly has good applications that I haven't thought of, but in terms of achieving steady tracking shots for video work it doesn't do the job.