Super Convenient, but minor issues
The UpCart is exactly as described. It folds up nice and conveniently and I've used it with over 100 lbs going both up and down steps.
I do have a couple of issues with it though. First, lifting the handle, one side telescopes correctly while the other doesn't stay in sync, so I have to hold that side when extending the handle to make sure it is balanced. If it's not balanced, the handle gets very unstable. First attempt at stairs it was in the unstable state and the result was not pretty.
Next, the bottom panel that folds down doesn't actually click into place. It counts on the weight being applied. But when there's no weight and the cart is just sitting there, it can fold over and collapse on it's own.
When weight is applied and you're using the cart, when you go to turn you can see the wheels torque a bit. Has me worried about longevity, but the cart is fairly inexpensive.
Lastly, I was going down some stairs, concrete, bit steep but nothing out of the ordinary, and the bottom metal frame of the UpCart scratched against the ground leaving a couple of marks. The wheels should be a bit bigger and perhaps a protective skid plate should be installed on the bottom.
So I listed the issues I've found but overall they are fairly minor especially for the convenience and cost of the cart. But I think you could make some minor improvements to the design and produce a significantly better cart.
Regards,
Jim McGarvey