While Parse solves a huge problem, there is also a catch - You are locked into an ecosystem where you have no control over your codebase incase of an Emergency. For example, Parse's recent downtime made developers helpless as they had only two options - Re-write the entire app, or wait for the downtime to get over. So basically, its a trade-off between convenience and reliability. Choose wisely.
No, this is not meant to discourage you from using Parse. If it solves your needs, then go for it, but always have this catch in mind and preferably have some kind of a back up plan incase Parse goes down along with your app.