Yea, this has been discussed several times in this forum:
https://bitcointalk.org/index.php?topic=484355.0IMO, not worth it due to the 5 year contract, which means you'll probaby have to reinvest at some point.
Also, they haven't been transparent in what mining equipment(if any) they've used. Plus, it's been noted that they use Bitcoin mixing, so that's another flag. Just suspicious all around.