I would suggest paying for the Retra snoot holder that Oskar sells when you buy the snoot.
It's expensive for a sack, but it allows one to clip the holder to your BCD so you can bring your snoot with you but not have to have it installed on your strobe at all times.
I've had and used the 10bar snoot (and was able to borrow a Retra on the same macro trip I was using the 10bar)
The 10bar laser sight, when lined up correctly (a bit of an issue on the original version), makes the snoot super easy to use. The tube pieces for altering the size of the snoot "spot" however were clumsy for me to alter during a dive.
Now I own a Retra snoot.