Quality control lacking.
342022
Arrived cracked and with debris in the hole.  Item is too small and too thick for proper gua sha technique.
2381570
These have promise, and were supposed to be from the newly engineered batch to correct an existing problem.  However, one of these parallettes was not level once assembled.  It appears that the wood bars are attached to the uprights without the entire unit being assembled, and because of this, the uprights were several degrees off from being square.  This results in one of the units having a pronounced wobble.  This could be an easy fix, removing the screws from one side of the bar, leveling it and reattaching the screws.  I haven't decided yet if I will do that or simply return the items.  For $70 (on sale) this shouldn't be an issue that I have to deal with.
3421446
Quality control was disappointing. First, the unit was dirty. I had to clean it before I could use it. Second the connections are sloppy, wires are showing, the rubber sleeve doesn't go into the connections. The plugs are also not very high quality. But the shut off units seem to be high quality. I bought this because is was more expensive and looked higher quality. I hope it works.
415742
This would have a five star if it weren't for a defect in one of them that I ordered. A whole line of thread is missing from one side of the case.  Otherwise the first one ordered was perfect. Quality control needs to be better.
2853088
Light output is uniform with good color.  Lost two stars for quality control. The bulbs are made of two major pieces, the lower shell which has the LEDs and screws into a standard socket, and a translucent cover that snaps over the top. With my  package of eight, received in an undamaged box, there were 3 bulbs with lens covers popped off.  After fighing them to get the covers on, which wasn't easy, I installed them in a 14' ceiling, where I found two were dead; one of fixed bulbs, and one of the un-damaged ones. 5 major flaws in 8 products is pretty poor quality control.

 Called Amazon customer service and got a full replacement without shipping back the working and non-working bulbs.  Replacements all worked fine, but still, I will probably not buy other bulbs from Phillips.
2444681
Works ok. A little too much soap even on the smallest setting. Quality control is not great. Scratch on the front from production, and the wires that hold in the bottom LED aren't protected from the elements like they are supposed to be. The wire insulation wasn't pressed into the potting material enough that holds the LED in, so bare wire is exposed.
72791
These are inexpensive and will work, but there are quality control issues. Mine had some issued with the paint on the numbers, a bubble in the d20, and a chip on one corner of the d4. They could be better, they could be a lot worse.
2617112
Couple of blemishes in manufacturing. Not super high quality.
1739952
The jaws are somewhat misaligned and don't close at the tip.  A bit more quality control and these could have been fantastic.
235757
Good design, poor quality control in manufacturing. Went together poorly, did not sit flat on floor, and was more difficult to assemble than it should have been.
846064
Of the 6 knives in the set, 1 has a rather badly pieced handle. The knives are beautiful, but the quality control needs some work... particularly given the reputation of Laguiole.
3041871
The inside stitching was not complete on half the bag. It wasn't necessary to function, only looks. Need to do quality control checks.
2594544
Descriptions for size and number of zippered pockets, etc, are accurate. BUT, there are quality control issues. Ordered two of them just before a 5-week excursion abroad. Taking them out of the box to begin packing the night before leaving, one of them had a zipper that was broken. Needed to leave that one behind and use an older suitcase. One of the wheels on the second one, which we took with us, managed one flight before it was broken. Clearly a fine brand name tarnished by lack of quality control in manufacture.
4150716
Arrived with a small separation in the interior lining. Not worth the hassle of returning this item. Quality control should have been better.
4774505
The frames feel pretty sturdy and the hardware is decent quality. However, the quality control leaves something to be desired. One frame arrived with silver paint on a corner and the other had poor paint coverage around the screw holes. You can see this in the images. Amazon resolved the issue immediately but I would have prefered to just receive a product that I could immediately put on my car.
2223213
Nice looking chair. Comfortable.  Easily assembled.

However, of the four screws needed to put the chair together, the mount on one of them arrived damaged.  Hence poor manufacturing quality control.
4405849
One of the four was not bent correctly and doesn't seat properly. Quality control should have removed it.