Komilla review for Sesami Booking App

UPDATE!! BEWARE!!! The review below is from my client whose site I installed the Sesami App in. This is from me, her web developer. Not only was this a terrible experience to install the Sesami app only to find out that one cannot in any normal way reschedule the appointment for the customer. To do it normally you have to refund the client and then charge them again. Owner says he is working on the feature to allow rescheduling but it is not on the horizon yet at all. He has some lame workaround no one would want to deal with. In my opinion, he shouldn't even have his app listed without a rescheduling feature and he has managed to get to the top of the booking apps fooling Shopify customers. WORST PROBLEM!!! It cost my client about $300+ of my time to install and uninstall. I asked owner to please cancel and not charge my client, yet today my client was charged $19.99 for an app the owner clearly knows she is not using and promised to cancel the payments for.... To make matters worse... as I write this I have been sitting first on hold via phone for 25 minutes with Shopify and now giving up on the phone almost 40 minutes with Shopify's customer service chat and I still haven't gotten this fixed. Hopefully, within the next half hour, someone at Shopify can stop my client from continuing to be charged and refund her $19.99. --------->>> I used the app to help with booking appointments - but it has no way to cancel or re-schedule. Very unhappy experience - so cancelling. The release is pre-mature.