- Missing checks on phone number and email, i can write everything in those fields (do it client-side)
- Does this have a Company admin panel? Something that shows them the list of appointments and gives the ability to manage them, get the info of the customer if needed, etc...?
- This is clearly a MVP, i suggest to put some time/money in the site layout when the back-end will be complete.
- I'm not sure the "no monthly fee" is the way to go. Considering that is rarely used elsewhere it could be a good candidate for some A/B testing.
And btw, it's clear that you are competing with the product of patio11, interested in seeing how it will go.