It's an awkward one. No it shouldn't be like that. It's not awful and I doubt the Quartz is compromised, but it's not perfect and if you're not happy then ..................Check for level.by looking at the bottom of all the units, do they line up? The problem is with the units, not specifically the fitting of the work top. It's the poorly fitted units that have caused the problem with the worktop. However, this should have been noticed and checked for level and that they were solid before the worktop went on. So, as often is in these situations it's 6 of one and half a dozen of the other. I'm presuming that the reason the fitter used shims is because the cupboard below wouldn't go up any further or it would have been completely out of line with the others for whatever reason? The doors are easily adjusted back to level, but the carcass should have been right to start with. Could this be happening because the floor isn't solid? There should have been no movement, especially not that much? I'm wondering if there was a little bounce in the floor such as you may get on floorboard with boarding over the top and the weight of the quartz affected that? I'd take it back up with the worktop fitter and the kitchen fitter together on site.

Like all quartz brands and also even granites they must be glue down correctly and with quartz it is silicone and no shims at all, you do not need them if the cabinets are level. First thing any installer should check with a 6" level. side to side, front to back. I can tell you know that this will void the Silestone warranty or any other manufacturers warranty, from the photos you have shown. You are correct does not matter if the floors are way out of level, the adjustments on the cabinets will take up the issues there. But sometimes it is also the legs are not weight rated for stone. They use them because the are cheap, but the flex and bow under the load of stone. The photo below is straight from the Silestone fabrication and installation manual and this is from our draft manual for one of the major manufacturers. Your stone counters do not even look like they have been stuck down into place, there is no silicone, nothing! Ps I know of two members on here that work for Silestone. They generally will pass information on.

I have solid surface worktops. Mine are Mirostone Taj Mahal. i work with kitchens. I have read the reviews that I think you could be referring to and agree with them. If you Google the colour of my worktops they are similar to a Calacatta Marble. I have had mine installed for around 4 months and I am very careful when placing items on them and also cleaning them. Yesterday we had to resort to fabricating them again so out came the sander and the dust extraction machine. We firstly attempted the peninsular top. This was done 3 times to achieve the finish I wanted and we ended up doing a wet and dry sand which shouldn’t be necessary. Then we tackled the island, sink area and the other corner. I had a long discussion with my supplier over these worktops and have told them that I consider them to be sub standard because they are China imports and not up to the usual pre Covid standard. I have a customer who had a very dark colour. She complained about them, I passed her complaint on to the same supplier I had mine from and only last week got a full refund for them. It took 8 weeks of arguing to get the money back. Even the batches were not the same colour code and this was apparent with the island. We never take the film off until fabrication is complete so were unable to see this. Mirostone is to the best of my knowledge the same or very similar to Minerva in its make up. Avoid it. I’m lucky that we can refabricate ours, not that I want to be constantly doing that, but we can to bring it back to life. We have fitted several Pietra solid worktops and have had no problems whatsoever with them, so take a look at those. They are very slightly thicker 25mm from recollection. They have proved to be very hard wearing. Charlie is right with the cleaning side of thngs. So many people use chemicals but you shouldn’t. Stick to soapy water only. Look at Pietra It’s good stuff. Here’s my worktops. Love them but am annoyed at the fabrication side of things. It’s all due to the recipe of what’s in the tops.

It is probably better to keep to one height in the sink corner, for all the above reasons. This time round I'm going free-standing. I discovered one height all round affects my shoulders - the worktops are too high for my height and different jobs (eg mixing, bread making, carving, chopping) and it seems there's a standard height just to fit the appliances underneath. My current, old, about-to-be-redone kitchen served its purpose but practically didn't work so well. So this time I'm including working heights that suit me, not the designer \ trader.