This tipping trailer is more of an 'enhanced wheelbarrow' and as such it's good. Assembly is very easy, but I guess that is a little subjective as it depends on your experience.
As a two wheeled, large wheelbarrow to manually push or pull around it's absolutely fine., because it's structural limits are greater than the limits you are likely to subject yourself to. Hitch it to a lawn tractor to use for sand or soil or similar and it's limitations become more obvious. The very basic axle mounting system is unlikely to last long carrying maximum weights, and you soon realise that the advertised weight capacity is much less than the volume capacity.
However the feature that is 'underwhelming' is the tipping function. because this version of the barrow has smaller wheels than it was designed for, when released (tipped) the bucket does not reach anything like the angle required to empty. Add to this the fact that the strengthening ribs of the 'bucket/tray' are on the inside, making it difficult to empty with a shovel either.
Depends what you want to use it for, but basically OK for the money.