I recommend this review: https://www.cloudwards.net/review/zoolz/ (Oh, I hope links are permitted :) The main point is that the service is CHEAP but SLOW, therefore not for everyone, but perhaps perfect for some. Personally am still considering it; will probably try the free 100GB offer first (Then probably find that I waited too long to get the $30/1TB :)
The 99% math actually works out considering that it is lifetime! Perhaps with technology improvements the speed will increase in a few years (wishful thinking), then again perhaps the project will get canned.
Ashraf, you listed this under “MAC” and I almost missed it – my only complaint.