Unfortunately I cannot recommend Cleanto for these reasons :

Cons :
- It has a lot of bugs, though most are minor I found they were enough to 'break' the functionality for the customer.
- Syncing with Google Calendar does not work and this app has not been verified by Google.
- It is not always reliable : For instance, sometimes it just depends on the order that customers choose multiple services. For me if they chose a carpet cleaning service and then also added an upholstery service, the cart would change from the price to NaN and they could not continue with booking. Sometimes it just said NaN in the cart price regardless. Sometimes it worked.
- Cart doesn't scroll properly.
- Back end has some minor bugs that are more annoying than anything.
- The built in calendar needs functionality added.

Pros:
- Customer service is good (however something's can't be resolved, or not resolved to a completely working state)
- The team seem to try and do their best, which I give them credit, but in my opinion Cleanto is just not up to standard
- I think with future updates, if everything is fixed properly and debugged professionally, Cleanto would have a huge amount of potential and I wish all the best for their team.

However in it's current state I cannot recommend this in good faith.