I have the go cruise still (but just finished installing the Rostra cruise). I liked the Gocruise as it was extremely quick and easy to use. I have grip puppies, and it would not hold PERIOD! I slipped a wide rubber band (the kind they wrap around vegetables like asparagus) around the grip where the gocruise is. That stopped the slip for sure.
I installed the Rostra because I wanted a 'for sure' for my trip to Alaska in two weeks! I still use the gocruise when I just need to take my hand off for a second or so. I would consider the Rostra before spending 160 bucks on throttle meisters. For just a few bucks more from Murph you get EVERYTHING! Brian's instructions are absolutely amazing, and it really only takes a weekend to do! If I can do it, ANYONE can do it!
But to answer the original question NO I HAVEN'T TRIED THE TAK-LOK THROTTLE LOCK