Instruct: Classify the given review into positive or negative sentiment.
Query: Do not buy this program!

I have used this product for many years. The original company Mathsoft(good company) was purchased by PTC (bad company). This single user liscence can only used on one computer. If your computer breaks or you decide to get a new one, you have to buy the software again. Single user liscences will no longer exist after version 14. PTC technical service is almost nonexistant. Even better you will very likely not be able to install this software on your computer. To get the software to install you will have to call technical service so they can give you the secret info for installation to be successful. After you get the secret info you will still have even more fun. May God have mercy on your poor soul if you buy this.