#1 - Yes, Authentication, Emails, forms etc will be all done with ease.

#2 - We don't intend to target the dev community. We're more towards people who have no idea how web works.

#3 - You can git clone the repo and make changes either to the UI or the business logic. So, in a way you're not restricted to the product. You can make CloudBoost.io do all the mundane tasks for you - and then git clone the repo - and make changes.

We're working hard to make sure its so flexible that you wont even need to git clone the repo - but it'll take time to mature over time.