I have used this service a bunch of times and it's always worked perfectly. But there have been a few posts recently talking about it being connected to AlphaBay, and that maybe because of that it's not safe anymore. /u/bitblender has not posted any replies on reddit to this stuff, which is unusual because usually he/she responds when paged. These are the posts I'm talking about:
https://www.reddit.com/r/DarkNetMarkets/comments/6q4c78/bitblender_alphabay_lets_talk_about_them/
https://www.reddit.com/r/DarkNetMarkets/comments/6q5w54/bitcoin_blender_credible_and_reliable_any/
https://www.reddit.com/r/DarkNetMarkets/comments/6p17qh/bitblender/
Assume FUD. There's no credible reason at the moment to believe any of that. If I were BitBlender, I'd be getting a little tired of the baseless accusations and probably wouldn't bother responding either. I mean, so he says "no." The kooks will just say "Oh, he is compromised...service compromise confirmed."