I've been shopping at IKEA for about ten years, LOVE it!
Best quality stuff is desks, tables, desk/dining chairs, dressers, storage, mirrors and bookcases. Everything is fairly easy to put together but anything with moving parts (like drawers) will be more time consuming.
I do NOT like the upholstered stuff (couches, chairs) the fabric is cheap and the filling/stuffing is even cheaper, it does NOT hold up well.
Oh, and they don't recommend using a power screwdriver but just do it on the lowest power and go slow...
Have fun, it is addictive, and you and your kids will love all the kid's room goodies!!!
Oh and let me add, I am not a "tool" girl but it is easy to figure out the directions on my own, it gives me quite the ego boost not to have to ask my husband for help :)