Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: how many panels are there?
Document: Hard to assemble. Wobbly. Not for rambunctious kids. Comes with many pieces and few instructions. Easy to bend by accident.
I got this product to make a guinea pig cage and it works great. I used zipties to reinforce it and it seems very sturdy. This set had enough panels to make a balcony on my cage as well as the large main cage.
Bought these not to use as a storage unit, but to use side by side as a gate to block off the space under my bed so my puppies won't go under it. Each panel has a nice weight to it, the coated wire bars are not thin either, and the panels worked perfectly for my use.
These are great! Pretty sturdy and you can use them in so many different ways! They are easy to put together as well! My 13 & 6 year old put them together when I was in another room! I was very pleased that they were able to do it without help! Only issue is that I bought them for storage and my girls turned them into a fort!
love the product however i cant have this set up other than the way pictured. on the instructions it shows you can set it up a few different ways. thats all fine however i am unable to do this for 2 reasons the first set i ordered came with just enough connectors but not enough grates. and the second  set came with enough connectors and too many grates.
I'm fairly careful with things that I own, as I like to (for the most part) buy things with the plan of getting many years of use out of it. This product is clearly not of that grade.Firstly, I should note that I received this during the &#34;polar vortex,&#34; and I am curious if the extreme cold had any part to play in the quality of the plastic clips that hold this thing together.
While putting it together, three of the plastic connector pieces broke in my hands. The instructions suggest using a mallet to tap the panels in place. I'm a 5'2&#34; female and the pieces broke while I was attempting to use them - how well do you think they'd stand up to a mallet? After the unit was assembled, it was so rickety I didn't trust it to hold up my guinea pig's cage. Luckily, I had a bag of small black zip ties on hand.
I ordered three sets, as this is an excellent way to sort and store yarn, while taking advantage of empty vertical space in my room. Reviews are mixed about the knob-connector pieces, so I decided to put them together with the included pieces before getting zip ties, to see how the knobs work. Yeah, get the zip ties. The panels cannot sit flush using the knobs, and the knobs do not have enough depth or length to give a sturdy connection.
went together fairly easy - seems sturdy although have only had it a few weeks so time will tell if it stays together. holds lots of shoes - great for our garage shoe rack!
we built a lovely 2x5 grid cage with stand for our 3 new guinea pigs! if you plan to place your cage on the floor or a table, there are enough grids for a loft or larger size base cage.
Answer: 23 panels, 24 connectors.