I've done it on all of my manual cars since I was 16.

My Dad's 1973 Pinto, my 1976 Pinto, the Nissan Sentra, Monte Carlo with a saginaw tranny, the Ford 3 on the tree, the chevy truck 454 with a Muncie, My honda Accord, My Mits Lancer.

Of course the bikes I've had and have. All without grinding the syncros.

Heck, even when I drove a delivery truck for a while, never used the clutch after a start... up or down, except to 1st.

Its not hard, it just takes finesse and timing properly... the shifter just falls into place when you do it right. I guess I just do it right.