I've installed several Ikea kitchens.
One problem is they are designed for forrin. And in forrin all pipework is channeled in to walls with service points installed about where the sink/dishwasher etc would be. In the UK this is rare and pipes usually are run on the surface.
The actual construction is very good, particularly the steel/stainless units which I've used in a commercial kitchen. Just as good as the catering units and a fraction of the price.
The only items that I have been disappointed with are the Ikea worktops. Every one of them has been of dreadful quality. The wooden ones split and the chipboard ones aren't waterproof. Not even if you carefully coat every single exposed edge with waterproof paint or sealant. Also the ones with "metal" trim use some substandard glue for the trim and after a year it falls off, then water gets in, and the worktop is ruined.
Shop elsewhere for worktops.