I used that Parker SR1 shavette during my transition from a DE to SR. The SR1 gave me an aggressive shaving experience and many cuts; I used (1/2) Derby Extra blades on it. I also had the problem where the blade tip would bite into the curve of my neck; there's nothing like a sting to the neck to get you to pay attention.

I called it quits after a month and got myself a Dovo SR. Looking back, I realized that my trasition would have been better if I went straight from the DE to the SR.

The SR1 shavette is an inexpensive way to test the SR world, but a Feather shavette would provide better shaves during this test phase.