I must say, at first I really didn't like it but it slowly grew on me. The vortex is extremely powerful. It will definitely mix your solution so you don't have to worry about that. You have to make sure that you place this vortex on a flat surface. This is very important because since the vortex is very strong, and if the surface is uneven, the intensity of the shaking will cause the vortex to move on its own. I had to move it to another part of my lab where the counter was even.Second, at first, the user interface bothered me because once you turn it on, you cannot go directly to vortex your sample. Nothing will happen if you do this. You have to maneauver to settings and make sure to press the "touch/cont" button to begin the process in comparison to other vortexes that you just plug it in, turn it on and go directly to mix your solution. At first I didn't like this but I wasn't going to lower its star rating for this trivial manner, especially when I have used it a lot for experiments with success. It really has grown on me. Have been using it since April 2024. Lastly, I really love the time counter that it has (at least for the LED version). When you place the tube, it shows you how long you are vortexing and keeps track of the time. This is perfect for protocols, replication and teaching students for those very finicky solutions that are very hard to mix.One last tip: When you place the tube on the vortex mat, make sure you firmly apply pressure down because this particular vortex will not start unless you apply a certain type of strong pressure (this is if your using the "touch" option. As it name states, it will only start when you touch the tube surface mat.I also love that it brings different types of vortex mats for different volumes of tubes. I have it use so far for some hard-to-mix solutions on 1.5ml eppendorf tubes.Very well made vortex.