We are in the process of having a kitchen fitted by MFI, the cupboards are OK, pre-built, but not fantastically put together,
You can do as good if not better if you put a flat pack together and use polyurethane glue ( comes in a big cannister) and really sticks - i have done this with MFI wardrobes and you cannot tell the difference.
The kitchen prices in the sale DO NOT USUALLY INCLUDE THE EXTRAS - and this covers the doors. - remember however to offset the freebies against the cost of the kitchen, as if you wnat them anyhow then its all a saving ( things like free dishwashers) -
Price up applicances at tradeappliances.co.uk - we managed to get a pricematch
Dont take out the extended warrenties - the company that backs them does a beter deal direct if you need it.
Do remember that if you get the whole lot from MFI it does give you a lot of leverage in prices!.
finally - remember that the kitchen is only as good as the fitter - and a lot of the MFI ones ( including the one that did ours ) are a bit slapdash - they get this way because MFI just continually sends out spare panels and missing /damaged replacements.
One other thing, a good kitchen fitter who has the trade work, can get the same kitchen through howdens, at the same price - but howdens dont sell the doors for most of the mfi kitchens.
You could also get the kitchen from diykitchens.co.uk - but get a plan first and remember that you need to get a lot of extras on top of the carcasses, so it is difficult to order it yourself.
One final thing - MFI take all the money upfront ( final payment 4 weeks prior) this means that you have very little leverage when things go wrong as they have all your money - this means that you have to threaten lots of action very quickly if you have a problem - it pays to have used a credit card in this case to buy the goods !!!
I should also add that if you use one of the mfi fitters you will be shocked at how much extra the fitting charges will be - extra sockets, plumbing, appliance connections - light ( oh yes - they sell lights but not the transformers - go somewhere else for the lights!!!!!)
At the end of the day however its still worth it a new kitchen always looks great ( even if it does take two weeks instead of one & ytheres a 5 week wait for the granite worktops )