CleanMyMac

CleanMyMac X does a great job cleaning up and speeding up ram and cache, finding duplicate files, and keeping your storage free of clutter (among other things). The app is intuitive, user-friendly, and self-explanatory (nothing to worry about as far as understanding what each button is for).
I used not to like CleanMyMac, but the company gained my trust back after with the latest version. The developers have done a lot to improve CleanMyMac (it has so many features now), so much so that I now use the app every day, and my Mac runs faster and smoother. Since I don't have huge storage capabilities on my Mac, I like controlling my resources. For the price, CleanMyMac is a safe and efficient option. Also, compared to other solutions, CleanMyMac doesn't slow down my computer, which is a huge advantage. Featuring malware removal also makes the app valuable.

I haven't found anything I am not happy with.

If you're looking for an easy to use all in one cleaner and anti virus software for your Mac, this is the software for you.

UI is sleek and attractive.

UX is easy to follow and well thought through. Easy to understand and navigate.

Favorite features: clearing cache, empty recycle bin, search and remove malware, maintenance scripts to free up RAM, purge DNS cache. Also there's the option to set a reminder to run CleanMyMac every week or month etc... so you never forget to run it and keep your Mac running in tip top shape.

Software is solid. It's a bit pricey as it's a subscription model (there's also a one-time purchase option) but the software does what it's supposed to do, it's chuck full of useful features and the development team continues to develop it.

With Cleanmymac, we have been trying to protect my favorite macbook and make it more well-maintained for 2 years, but unfortunately things do not progress as easily in macOS as in Windows. Because the macOS operating system has closed source codes and cleanmymac can't do anything without administrator permission, even if it tries as much as it wants.

I didn't really see the expected impact of Cleanmymac on device performance. I have to be frank, the only thing that impressed me was that we could adjust the fan speed, but unfortunately none of its other features really work.

I love how easy it is to use CleanMyMac. It has a clean and intuitive user interface and great optimizing tools that just work. I don't need to do any manual/repetitive tasks to optimize memory, clean my disk or have a precise view of what's taking space in my computer. I just make a couple clicks and it's all done. Also, I don't need additional apps for different tasks. CleanMyMac does it all!

Nothing not to like. I had only one issue with my antivirus, but it was solved in a couple minutes just checking CleanMyMac's website and updating it.