Love Subbly & their support team!
For our first couple of years in business, I used a competitor's back-end platform for my subscription box, and switching to Subbly was one of the best decisions I have made for my business! Subbly offers some great functionality (e.g., commitment terms), their platform is easy to use, and their support team is second to none. It's actually shocking (in a good way!) how responsive and helpful their support team is. If you're thinking of starting any sort of subscription business, don't even look at the other guys; go with Subbly!
Subbly's customer service and support is amazing! I also love being able to offer commitment terms to my subscribers. The financial commitment is obviously beneficial for my business, and my subscribers appreciate being able to pay monthly for any subscription length.