I have Bitcasa Infinite Drive, now its showing "7,99 EB free of 7,99 EB"
EB is Exabytes, you can look it up what that means! And I am actually using around 900GB now. Uploading really big files, like10GB+ can be a hassle (some fiddling and "babysitting" uploads) but for smaller files its easier.
For unlimited cloud storage space you have to decide for yourself what is acceptable download speed if you need to recover files, cos no-one is going to download petabytes of data on a personal cloud storage...
Would I recommend this service? Only if you get a special deal, cos they are still ironing out a lot of bugs, its still not smooth and robust (think Dropbox)....