I've bought bits and pieces from Ikea over the years, as some items are cheap, cheerful and good quality. I don't mind assembling myself, but I tend to not follow the instructions to the letter (too much haste) and so one piece of the furniture is always on wrong, or there are screws leftover. For this reason, my husband tends to be the constructor in the family.
The kids furniture at Ikea is great quality and very affordable.
for our larger items, such as sofa's and dining room furniture, we've tended to look elsewhere. More for personal taste than for anything. When I was at uni, I think my whole flat was decked out in Ikea's finest.