Bought for my 2 year old, but had to be big enough to share with his 7 year old sister and it is. We have had this since May and my son has used nearly everyday.
Very easy to assemble once you take 5 to look at the instructions and separate the wooden lengths into piles etc it really does just slot into place then screwed to make rigid.
The cover is good, with elastic to hold it around the corners, only down side is rain sits in the middle of it so we pile the toys to create a tipi effect to stop this, I'm sure it would happen with any sandpit and cover.
Overall a great product.