Putting together the cabinet are like putting together any other Ikea furniture. Hanging them are as easy as hanging a level rail and sliding them on. Took 4 of us 4 hours total include demoing of the old kitchen. We made it a family event when we put together our parents kitchen. Complicated part can be doing the plumbing and moving any electrical if you have no experience with that.
Good thing about Ikea, is wait for your Kitchen event. I believe you can get up to a $250 gift card if you buy they appliances. Which can then pay for the upgrade knobs and handles you want.