I did a very similar thing to Nancy - flew to glasgow and got it all delivered. ended up paying about €400 on delivery, but cos we bought 5 grand of stuff it was still a major saving. couches were made to order and delivered 4 weeks later, rest of gear was delivered in 7 days.
havent opened it all yet cos waiting for extension to complete for some of it, but delighted with everything we've done so far. not a piece missing and instructions top class - anyone with a decent diy background should not have a problem with any of it.
joanmul - what are the chances that your carpenter has never actually fitted an ikea kitchen and is just warning you off something he knows nothing about? I'm getting my kitchen through a contact here, but if I wasn't it would defo be Ikea cos we were totally amazed with what we saw over there. Agree on B&Q kitchens though, from experience I can say they are poor quality.
If you are planning on getting loads of gear, defo allow 2 days - one for going round picking stuff out, couple of hours the next morning for going round the warehouse and picking it out. this will give you time to mull over your decisions that night, as it can be hectic getting around the place.
If you have the option of bringing a van over on the ferry and going to an Ikea in Wales I'd say this would be the best way of doing it.