I'm a general contractor and we are subcontracted with lowes. we do A LOT of kitchen remodels with lowes. as others have said, you get what you pay for. we've done cabinet jobs from simple to custom, from a couple grand all the way up to 30k just for cabs and counter tops. lowes does offer some very nice cabinets. kraftmade is probably the most popular sold around my parts and are very solid cabinets. here's how the process will go:
you'll go to store and pay for a "detail" which is basically when a contractor comes to your home and measures the basic dimensions of the room(existing appliance layout, ceiling height, wall length..etc)
measurements back go back to store, and then the store employee does a general layout.
then all the details will be sorted, brand, style, color, finish and so on
fairly smooth process. and speaking from lots of experience, double and triple check on delivery day that all pieces that are on your shipping papers are actually delivered. the contractor doing the install should be there when your product arrives to check it all in, and if something is missing will contact your sales person.
kitchen remodels are probably my favorite sort of job. so much change can happen in so little space when compared to old/new kitchens cabinets.