I've also used Bitblender in the past (and I wore their signature for a bit over a year), but the site is simple, easy to use and is just as trusted as any other BTC mixer out there. They've been around since early 2014, but make sure you go to their onion site (http://bitblendervrfkzr.onion/) instead of a scam site like the following: https://bitblender. me/. Bitblender only operates their main onion site and an informational site that can be found here.

The official Bitblender thread can be found here.