I've been following Sato since I left the Marine Corps since 1984. Maybe 3 people since then have cut my hair once, All at Miano Viel, when he wasn't available and all with great results. The staff is always friendly and great to be around.
One thing I've been asking for quite some time is for you to email\call me 2-3 months after each visit to remind me to come in. My wife prefers my hair long and doesn't remind me to come in, and the cut is so good my hair still looks great 6 months later.
Aside from that just keep doing what you are doing!