Probably good!
If it weren't for the trial and purchase process, I probably would have bought it. But 3 days of trial and then automatic purchase without knowing if I will be able to cancel it if I don't like it is not reasonable. It should be a 3 day trial and then a purchase option. Unfortunately I have had problems with other apps that canceling them has cost me a change of my credit card’s number. The 3 stars is because you should know that, it is part of a good service.