I bought the door buddy with the latch plus door stopper and I have to say? This is the best invention ever! :)I have lived with baby gates for decades to keep my 2 pugs out of the litter box/cat food dishes. When they passed away, I took the gates down and my hips breathed a sigh of relief. Nine months later, I adopted another adult dog. I certainly didn't want to have to re-introduce the baby gates if I didn't need to and our female cat (now 17 years old) certainly didn't need the added stress and physical mobility to be able to jump up and over the baby gate to toilet! The first week after adoption, I didn't put up any barriers and I was thrilled; the puggle didn't seem at all interested in the cats, their food, litter, etc. I assumed that his GI issues were just a result of him "settling" into his new home. I was wrong. One very sneaky and SICK dog was feasting in the litter box daily.After multiple (failed) attempts to create a solution myself, I went online to see what solutions were available. When I found door buddy, I truly didn't know if something so simple would work. If I'm being honest, it also seemed like a lot of $ for what I was receiving...I installed one in a utility closet that I have converted to the, "litter room" (hinges on the right; pulls open). The dog can't get in! He chased the cat down the hallway and followed her right up to the door and just stopped. Didn't even attempt it! Are you kidding me? How many decades did I HATE the baby gates and this tiny solution *fixed* the problem!This week, I found the dog eating the cat kibble (currently in the workout room) and *peeing* on my treadmill bed... gggrrr. I quickly ordered a second door buddy with latch stopper for this door (hinges on left; pushes open)? It installed just as quickly and it keeps him out.Did I spend $60? Yep. Is it worth it/wonderful/am I happy? Absolutely. When I think about how many $100s of dollars that I spent on baby gates that hindered movement and caused me physical pain every time I straddled them? Combine that with hours of sick dog and the time/energy spent cleaning up after him? SO worth it!For the couple of negative reviews on here (and the reasons cited for the device not working), I might respectfully suggest that you check out the webpage for alternate installations. I used the method that the website recommended was the most durable and it has worked for both style doors. I also read a comment about a cat who didn't fit through the hole left between the doors. I have a large male cat who is also VERY skittish. I truly worried that he would be so afraid of the small entry that he might not use it. So I installed with the largest gap possible to allow him to feel safe that he could enter/exit. Day one, I didn't latch it, I just used the stopper that prevents the door from closing. The next day, I hooked the latch on the widest setting. Next day, I modified it so the gap was narrower. My large cat fit easily through the hole and the medium dog didn't (I included a pic of dog/cat for size comparison). On the second door, I just measured the same distance I used on the first door, adjusted the band and the cat easily went through on the first go.Low profile, aesthetically pleasing, easy to install. Genius invention. THANK YOU!