I used the same lowering blocks pictured above for about three riding seasons. Motorcycle handled just fine, just be sure to use the bag spacer kit provided or the shocks will rub on the inside of the saddlebags.
Just installed the Progressive 1" front fork lowering kit and am very pleased. I could tell instantly the saddle height was 1" lower after doing the front forks. You won't get quite a 1" drop at the seat without doing the front also.
The bike rides and handles much better for me and my 32" inseam. Lol