A friend just bought the one you like - and it is VERY nice - we had got the similar one from M&S - but that one is a little bit more restricted in options - although the new version seems to have solved this. Your really do want to see them in person if possible. We then waited for the usual '30%' off events
Yes we have this from IKEA - cheap but it is sturdy and well thought out. You have to add a mattress obviously and there are no underneath cupboards, but the advantage of that is you can put another mattress at the bottom to be a guest bed, or fill it with your own shelves and drawers, or it can be a play den.
A friend has the Aspace one for her ds. It is lovely.
The only downside, I think, is that the side on it is not high all the way along. So I think better for an older child who won't roll out. The storage underneath is more limited to clothes and smaller items, although well organised with the shelves, etc.
Ds has a Thuka one. I can fit huge toys under it as well as baskets of stuff and then close the curtains on it all!