Had a few pieces of furniture from IKEA, not built to last forever but if you're on a budget some of their cheaper items are great.
The homeware section is what I usually visit for as they sell everything from rugs to pans at very good prices. Food shop has some very nice treats like frozen Swedish meatballs. And always grab a 50p hotdog at the end because I've spent so long in store I need food!
Had an issue in store at Milton Keynes last year where I went in to go to the food section to get some treats and beer before a gig later on. I paid for all my items and put them in a bag I was carrying. I was then followed out of the store by security who asked to look in my bags. When I asked why I was told that I had gone straight to the food section and I had put items in my own bags instead of an IKEA bag. Not wanting to pay for a store bag is not suspicious behaviour. They had a look and said ok thank u. They were polite but that policy is ridiculous. I have never had any problems at IKEA before, although a few months ago I was followed around by a security guard, who followed me all the way to the tills for a good 30 mins. So I'm an indecisive shopper on a budget, doesn't mean I have to a) buy everything I look at or b) steal. I bought a few things I needed and could afford.
These incidents haven't put me off shopping there because I have been in the past multiple times without any problems. Make sure you put a few hours aside for the trip though because it's huge and people move very slowly.