A User of Booking Calendar
Great app, works very intuitively.
However: they don't tell you about the costs or limitations on the store-page.
If you are looking for a free solution without limitations, and you first have to go through the trouble of installing en creating a form before you discover that you have to pay for the apps services, this is very inconvenient.
It would be much more customer-friendly to be honest and up-front about it.
For more information about price and limitations, I quote from their own website:
"Free edition has the daily quota of 10 bookings and $1 reserve fund. If your form has less than 10 booking per day, just use the add-on free forever.
If need more, add a credit amount would increase the daily quota (permanent) and reserve funds for the whole account. If spending all of the daily quotas, it will spend the reserve funds (cost 0.1 per booking) that help maintain the continuity of your business booking.
For example, if you activate $5 license key, it will increase your daily booking quota by 5 and add $5 to your reserve fund."