Just a short review and first impressions of this incredible razor. I used a Feather blade today as I have read many posts about success with this combination. I will try next week with my favorite Astra SP blade. I used my boar brush and Proraso green soap. First thing I noticed was the fact that this razor is smooth, cuts whiskers with noooo effort. This fact makes it a little deceiving, you have to go slow and carful. It will let you know if your technique is the least bit relaxed. The angle you hold it at is very important! I haven't tried a 37 but with the heavy handle, do not place any, any pressure on this razor, I felt a few times a grab when I didn't pay close attention. With the lighter handle it may be more forgiving. The only other razor I have used that I would call aggressive would be my Slim adjustable. With the adjustable turned up to 9 I got a very good 2 pass shave. The adjustable gave me feed back when set to a more aggressive setting. The feed back gives a constant reminder of the potential for blood letting, the 39c does not and this is the reason to be so carful. I did get the most amazing 2 pass shave, Jodi even commented that she couldn't believe I could get a closer shave. There are a few places that I normally don't get as well because of irritation if I go at them too much. The 39c cleaned them up. The first pass was WTG and second was XTG above the jaw line and ATG below. So I would say anyone wanting to try a slant bar to go for it, just be carful and respect the hammer!