I have no experience with one, but I do own "the world's best Sigma" (Shihan has the "World's Greatest").
What kind of stuff are you looking for? What is your opinion of it?
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)