OK, bottom shelf product
580078
I bought the safe after minimal research since I needed to get my pistol locked up with a curious 5-year old in the house.  The package arrived with no visible damage to the box, but the face of the safe was dinged up (scratches and scuffs).  Not a big deal to me, it was a cheap safe.  I went through the manual and set up the combination which was easy enough.  As others have mentioned, the beeping is loud and the safe should have an option to disable it (it doesn't).  Oh well, it was a cheap safe.  After playing with it some, the door catches a bit when you open it and the whole thing feels pretty cheaply made.  Oh yeah, it was a cheap safe.  3-Stars for the price I paid.  If this was a $150 safe, it would be 1-Star.
I wish I would have read about the Stack-On PDS-500 before I bought this.  It's the same price and from the reviews it looks like it doesn't have some of these issues.
1879151
Make sure you purchase 3m double sided tape or something to hold it up. Product is not made for bottom of cabinets. We've installed this product for a few of our customers and get call backs because the product doesn't stick to the bottom. Yu get what you pay for.
4628264
Works well.  I recommend it.  Sometimes the little plastic pieces that are supposed to support each shelf are too thin so the shelf slides right over the holders and falls down.  It comes with extra holders so I just throw the bad ones away and still have some left over.  I wouldn't trust putting anything super valuable and heavy on these, but it works great for basic house supplies.
3312199
The item was easy enough to assemble, however it did arive slighlty ding up inside. All the pics and discription do not state that the bottom is one large opening not two drawers.  Not quite what I hope for- but it will do.
2048865
We just got this yesterday so I have no idea how it will hold up. The shelves a quiet thin so I don't suppose you can put much weight on them. The shelf supports are made from hollow plastic. It's about what you could expect for the price. I'm not expecting much and will probably be getting something a little more substantial in the future. This will do for now. Just hope it lasts until I can find something better,
1984887
I bought this to set on top of my kitchen counter to keep a few things that always clutter is up like a jar of coffee, sugar, tea, etc.  Some of those things are pretty heavy and these shelves hold them up just fine.  Having said that, they are on the flimsy side.  There are only three legs and they don't stay perfectly vertical.  Sometimes I have to move them back into place.  I'm not worried about anything falling, though.  It's just an aesthetic thing.  They would probably be sturdier if I placed them into a cabinet and pushed it up against the back and side walls for extra support.  On the counter, it's not so solid.

Also, these don't look as clean and modern as I had hoped. The plastic tops are very clearly plastic, and not the sort of hard plastic that could almost be glass.  From a distance, they look fine.

It's somewhere between a 3 and 4 star product.  I gave it 4 because it does what I needed and the detractors are not so noticeable.
2735759
This item was just as described but It is hard to use.  If both levels (shelves) seat a book then the rack topples over when the bottom book is removed.  They are also hard to store. I use a few of them but like to tape down the bottom shelf when using it for a display.
1779387
There were a few tiny baby dents on top (like 2) and on the bottom shelf one of the sides is bent out but I just hammered it back straight. Otherwise it's what I expected and wanted.
2002587
Not much to say about this shelf. It works. I had it installed with the Kendall 19" rack.
Remember to buy the rack screws, they are not included.
4814894
Only giving three stars because it is difficult to install, shelves are somewhat flimsy.
46913
If you want to use it to organize CD's / DVD's / BluRay's - it will do an OK job.  But there are cheaper options that will do the same thing better.

It's flimsy plywood, very prone to warping and sagging.  It cannot support the weight of a few books without the shelves sagging noticeably.

To it's credit, it IS very easy to adjust the height of the shelves, and it's pretty stable.  It just isn't cheap enough to justify how flimsy it is.
2304299
easy to assemble, good looking, serves it's purpose well.  Only complaint is the non-finished underside of the shelves. A choice of finishes would be good, too.
3731494
Ok for the price, but it's not "sturdy".  It's also a little chintzy that you can't adjust the shelf height, as noted in the description.
4274146
There is probably nothing functionally wrong with this rack. The problem is the picture shows there being a metal "shelf" at the bottom of this stand but it actually had straps. This was for my daughter and she specifically wanted a rack with a metal wire shelf at the bottom. Because it had straps instead of the shelf shown we sent it back.
2405890
Eeeeeh. Not an excellent shelf, but OK for $16.00. The finish on the brackets is cheap. The shelf will serve it's purpose, but if you like top shelf nice things, maybe find something else.
1243052
The shelves are a type of plastic.  Quality is not the best but the price is right.
1418418
I wasn't actually sure how to rate this.  It's honestly probably a 3.5 star product.

So...the good: actually pretty stable, and perfect if you have a small kitchen or desire to fill a small nook.  I've used mine as a sort of coffee station.  I think you could probably place a lighter weight or smaller microwave on the top shelf with no issue.  The shelf arrived quickly and the instructions were pretty great especially compared to Ikea. That leads me to the bad.

The bad: while the top is pretty thick, heavy and sturdy, the same cannot be said for the shelf and cabinet base.  You're probably looking at a few millimeters thick particle board-ish material on the base of the shelf and cabinet.  This being said, I'm pretty certain you could stow items like a generic coffee maker, popcorn maker, a lighter weight blender, plastic bowls, etc... without any issue.  I would NOT recommend using the this to store items like cast iron pans.  Though I haven't tried it myself, I'm guessing the end result wouldn't be pretty.

And finally, the ugly ugly ugly.  This shelf was pretty easy to assemble, and clearly depicted all the pieces, but when assembling, DO NOT over tighten!  I'm not frail, but I'd never be described as imposing or strong, especially as a petite female.  That being said, I split the wood or wood-ish pieces in about five spots when assembling this item, and that was just by setting the screws until they felt tight.  The slat material is pretty soft, so I'd HIGHLY recommend you stop when you feel the screw at a minimum tension, then go from there.

Overall, why would I give it four stars?  It looks good, and despite the wood splits, seems pretty darn sturdy.  Don't over estimate what this shelf can store, don't over tighten when assembling, and it's a decent product, especially for the price.