As a contractor I have designed and constructed scores of IKEA kitchens (check my Houzz page) - many times in homes valued over $1 -1.5 million, once even in a home worth over $2 million (this is Toronto, house prices are insane here. $700k is practically an entry level starter home in this city).
Anyway, anyone who turns their nose up at IKEA cabinets is sadly misinformed - they are excellent. They do not 'fall apart' in five years - that is complete hogwash (the doors are warrantied for 25 years BTW).
I'm more inclined to say that a lot of so-called 'custom' kitchens I have seen in high-end homes are the ones falling apart in short order - and try getting back a custom cabinet builder to address a flaking finish or sticky drawer a few years down the road!
This designer makes a better case than I ever could: http://carolreeddesign.blogspot.ca/2009/10/why-i-love-ikea-kitchens.html
Q