Use the search feature.
You will find people that like it and people that don't. I had one and it failed in three months. I think its cheap and I will never use one again but yes it will work. You need to ask yourself if all your snakes are only worth $35 bucks or if they are worth spending $100-130 for a tstat that will last a life time.
I recommend Herpstat by Spyder Robotics. I have two 1s, a 2, and a 4. All have given me problem free service.
Reptile Basics also has a widely used and trusted tstat for the same $100-130 range.
Helix is another trusted tstat that you can pick up near the same price point.
Using the search feature you will find a ton of information on all of these options.