for all my personal information, no. but it is a good way of backing up your stuff with out losing it but i still rather back my own stuff up on a external hard drive that is not on the web.
I personally think that the whole cloud thing is not that secure, however this is my personal opinion
Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a metered service over a network.
I have good relation with cloud computing and desktop clouds and that is just superb because I don't need anything in my side but just an interface to access the web through remote access. It has many advantages but I came in to the idea because of the security and easy software compatibility.
Depends on what type of cloud hosting - if its free cloud space - e.g file, email or media... Then i would not trust it. If its cloud web hosting - i would 100% trust it more than dedicated or shared hosting.
I use Amazon EC2 and S3 for web-hosting. It is somewhat difficult but rather secure, flexible and reliable.