Instruction: Answer the given question using the supporting document.

Input:
Question: How sturdy are the shelves? Do they bend easily?
Document: Perfect for our intended use. Easy to assemble, reasonable price, and fast free delivery. We needed a stand for a large TV in a bedroom. This works well and we could put the cable box, dvd player on the first shelf with only a very small, hole easily cut into the backing for the wires. The boxes hide the little hole. Plenty of space for DVD's, books and decor items on shelves.
Not real sturdy(wobbley),was banged up or had scratches in small areas.Nice thick shelves. Too heavy for me to re-package and take to UPS, so I will keep them and try to find a way to sure them up.Longer then two day shipping.
This was an easy project. The directions recommend two people assembling these but I managed  alone. Took  less than an hour to complete. Parts are clearly labeled. I would have given 5 stars but there are scratches--some very deep-- on the face of the shelves.Otherwise very nice I needed this for my home office and it's very sturdy and attractive.This bookcase looks very handsome for a low price.
Looks very nice, easy to build, perfect dimensions and no sag on the shelves when it's fully loaded with large or heavy books. My only less-than-positive comment is that the backwall of the unit is painted cardboard, so if you anticipate rough usage, as in kids placing books back in the shelf with a little extra body language, you might lose your backwall. But even then, you'd still have an otherwise sturdy open bookcase.
I spent a bit of time looking into bookcases, storage bins, shelves etc. I bought this bookcase because it matches the other furniture in my room (black and brown). My husband put it together in about 1.5 hours, while complaining about the poor directions, but it looks decent and is solid/sturdy. Like other reviewers, I think that the cardboard "beadboard" back is chintzy. I would gladly have paid an extra few bucks for an upgrade to pressboard.
I just got it yesterday, and it was a breeze to assemble it even for a 7 month pregnant lady. It is better quality than I was expecting and it feels pretty heavy. I don't think those shelves ever going to  bend. It looks really nice too. It is almost too fancy for the purpose I bought it for - to store my son's toys in the living room. But at least it looks classy :)
THe package arrived a little late, but I like the product. Assembly took about an hour. The directions were clear and easy to follow.I do notice that the paint chips off very easily, so be careful when you put the shelf together. Overall it is a good product.
I had several extra hardware pieces even after a triple count check for accuracy.All in all and after only one error on my part this unit went very carefully together in 45 minutes from scissors thru plastic wrap to the completion of the project. The tiny scratches were easily fixed by using the provided marking pen that matched the darker finish of the top, bottom, and frame.
Beautiful for particle board construction. Is actually very sturdy and and can hold a lot of books or other materials.
Looks much more expensive than it was~ easy to put together and very sturdy .I would buy more of this type. Good looking.
Answer: Shelves are very sturdy. The back panel is not. If the unit is to be placed against a wall, it will be fine. I have heavy books and wine bottles on my shelves with no problem. Unit looks like a piece that cost more than it really did.