I like that it's easy to use, has an intuitive interface, and offers a great deal of flexibility when setting up recurring payments. It also allows you to set multiple payment options (e.g., pay monthly or weekly) which can be nice if your business operates in different time frames. The only thing I dislike about this subscription product is that there isn't any way to change the amount paid per month without going into each individual invoice. This makes it difficult to calculate how much money we are making with our customers at any given point during the year. We're solving this problem by using two separate subscriptions - one for invoices and another for bills. By separating these functions, we have more control over where our funds go.