Very sturdy considering it's foldable & very light
I bought this for my two Poodle/Shiu Tzu 20-25 lb. pets to climb onto the very tall family member's bed. Naturally, I had to put their paws on it step by step a few times to get used to it.
One was only slightly afraid of it at first, still after a week only goes up it very slow after now only verbal prodding & soon he will not need the prodding (he has to get used to not being lazy & being picked up.) He uses it to go down as well as he has shorter legs & the jump down must bother him enough to use it. The one who was terrified at first, she now races up it like it's nothing, but has longer, springy legs & does not need it to jump off.
It does move easily when pushed by a human as it is only lightweight plastic, but they seem to have no problems & the leverage is great & center of gravity is nice & low to keep it stable.
For the price & convenience of something foldable & lightweight, it's great.

Great item
I have had these steps now for almost a year. I bought them thru Amazon and actually paid a little more for them then than they are now so that makes them an even better deal now.
They are sturdy, well built, easy to clean and a snap to fold and store.
Some people said that they found them to be wobbly or that their pet slipped off the side - That might be true if you can only use them in the direction they are shown in the picture however I turned them sideways so that one side of the bed was on the long side of the steps and my 8 lb dog and 13 lb older cat have no problem using them. Unless they have changed them since I bought mine, I was very impressed with how stable they are.

so far, so good
no, these are not the sturdiest stairs out there. but for the price and the weight of the product, they are not bad. we bought ours from seller "Litterboy Pet Products" and they arrived quickly and in good shape. our corgi who weighs about 25 lbs has no problems going up them, she's still a little unsure about going down them, but i think she'll learn.

great for cats!
My older persian mix has been experiencing some arthritis lately. She had been having trouble getting up on the bed, as her legs are a little shaky. I knew I needed to get steps for her and these are perfect! First of all, these are the best priced for the size. I saw other 4 step ones for much more money. They were very easy to set up-took about 10 mins. They are perfectly sturdy for a 13 lb cat---I don't know if I'd feel secure if I had a larger animal. I have it next to an ottoman (my cat's bed) and that adds to the stability. I read a reviewer somewhere who thought they'd be great for a toddler....I would NEVER do that! NEVER! I have mine set up on a rug-so there is no chance for slippage...the non-skid pads are small-if I didn't have a rug I would put it on a yoga "sticky" mat to keep it stable. My cat didn't want to go down it at first (no problem running up it!) but I put her favorite treats on it when she was up on the bed...and down she went! Now she has no problem with it. The treads are perfect-seems like they will take a little traffic and do the job fine. The other cats just ignore it....My cat and I are very pleased with this purchase.

Don't hesitate to purchase!
This is the second stairs we've purchased - we have two bedrooms and the stairs allow our two Yorkies, and my sisters teeny-tiny baby Yorkie to zip right up to bed! Plus! We discovered a second use! During the day we lay the stairs end to end, and block the teeny-tiny from the rest of the house until he's housebroken! Hey, it works! Sturdy, well built & fast shipping - best I've found for the price!