As many people have already posted, you MUST pull out the back legs fully and lock them in place before using, otherwise this walker is totally unstable. Apparently many people don't read instructions first, and that's what has caused a lot of misunderstandings about this walker. You can't just pull it out of the box and think it is ready to go. The manufacturer also has put a warning sticker on the walker itself that the legs must be fully telescoped/pulled out and locked before use. Having said that, I agree with others who have said that even more warnings need to be made, like a big red warning sign on the front of the instruction book. Older folks don't have the great eyesight they used to have and some don't have anyone to help them assemble this type of item, so I feel it should be even more fully shown in big red letters to pull out the back legs! Okay....now that I've gotten that out of the way..... Here's my list of pros and cons on this walker. Some may not apply to you or your situation, so always bear that in mind. I do recommend trying out a three wheel walker at a medical supply store before buying online. If you have never used one of these lighter three wheelers or only used a four wheeler like I have, you may need to "test drive" one to see if it's really what you need. Pros: Smaller than a four wheel and more compact for storage in the trunk of a small vehicle. Doesn't take up as much space which is very nice for people who don't have a car with a lot of storage area. You could even put it in the back seat of your car. It folds nice and flat. Nice to use in small spaces such as stores with narrow aisles, homes with narrow doors, etc. Good maneuverability. The included bag is roomy and can fit enough groceries for a quick shopping trip, or to carry things from room to room in your home. Cons: No seat. If you need a seat, do not get this walker. There is no seat. Stability issues with this walker. True, it is more or less stable with the legs secured, etc. BUT.....if you are used to a four wheel walker you are going to need to be careful with this three wheeler. I am petite and even at my small size/height, if I leaned my weight too far over on one side, it WILL lift off the ground somewhat and could tip. I do NOT have that problem with my four wheeler. I can't recall any time ever where I even felt unstable in the slightest using a four wheeler, but with this three wheeler, it's a different story. Need to pay attention to where you are going, or uneven surfaces, up and down sidewalk curbs, etc. I would not recommend this three wheeler if you are a larger or heavier person or if you need the walker for weight bearing. For light balance to help you get around it's okay, but I think it's iffy for heavier people who need it for weight bearing. I'm not saying 100% that it WOULD tip and throw you to the ground. Just saying it could happen. So, I'm not thrilled with that aspect of it. I am using mine as a back up for quick errands outdoors like quick shopping, post office , etc. But would not want to depend on it for more than that. Let's talk about the weight of this item. True, it is somewhat lighter than a typical four wheeler. But here's what I've had problems with: in using my four wheeler, when folding it up, I could grasp onto the straps to lift it in and out of my car. But with this three wheeler, I have no where to grip onto except the frame of the walker itself. I've found myself having to "heave" this walker into my car in a much more cumbersome way than I did with my four wheeler (if that makes sense. hopefully it does for those of you who have used four wheelers and know what I mean). I've been really unhappy with this element of the three wheeler, in a way I didn't expect to be. I was excited to have a "lighter" walker to put in and out of my car, only to discover that it didn't feel lighter when actually lifting it in and out, due to having nothing to hold on to. This is again why I recommend testing out one of these walkers at a medical place before buying. I should have taken my own advice! It's not a design flaw, although I wish there were some type of strap to hold on to in putting it up and down from the car. Maybe I'll invent one myself lol...again ,it all depends on your physical issues. If you have poor upper body strength or back issues, obviously ease of lifting is a big deal. Try not to be fooled by videos showing an elderly person doing it so easily. You, yourself, need to test it out in that situation for yourself. Another con: the basket included with the walker is very difficult to figure out or use. I still haven't figured out how to securely attach it. So, that may end up not being used which is too bad, as I would like to use it for shopping. Anyway, I guess that's about it. I'm keeping mine and hope I can safely make it work for the intended short errands in the car. However, I will be careful and try not to put too much sideways weight on it. I think it's probably a helpful device if you keep all of these ideas in mind.