I think almost more important than who you buy your kitchen from is who you have it installed by. How did you find your joiner, was it a personal recommendation? Online reviews (good or bad) for tradesmen mean less than nothing in my opinion.
THIS! Ohmigosh! Shortly after we moved in, we had some work done to make a start on our house. And, oh my gawd, did they do a bad job! We wanted a doorway moved from the end of the kitchen to the center of the wall so we could have cabinets in a C shape around the room, but the new door is off-center by over an inch because they measured from a false wall/paneling that the previous owners put in and we were still in the process of removing, so they calculated from the wrong point (which is a little, insignificant thing that nobody will ever notice, but it bugs the he|| out of my husband!). Plus, the doorways are meant to have curves at the top corners, and all the curves they created are uneven. And the plastering job... oh, what a mess! After they finished it and I was checking it out, pointing out the biggest blobs and splodges, he claimed "it's not possible to have perfectly smooth plaster." I was all, "... uh... yes!" *points at other walls* Plus, they flung plaster all over the place (and didn't clean it up!), and they didn't dropcloth anything, so masonry dust got into everything from when they drilled and cut through the wall to put in the new doorway. I still find things with a layer of fine black powder on, more than a year later.
We'd found him online, where he had dozens of rave reviews. Far more than anybody else in the area. But the difference in quality between what we thought we were getting based on the reviews and what we actually got was huge. We can live with the imperfections (off-center doorway, slightly uneven curves), and we will eventually need to have the plaster re-skimmed anyway, after we've finished clearing out that wall and tidying up the room, so the walls will get smoothed. But we paid for a centered door. We paid for curved corners in the doorways. In the end, I think we paid just to make them go away and stop making a huge mess of my house.
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So, yeah. Don't trust reviews. Talk to people who've actually had work from your builder. Maybe even ask if you can see their work.