Just had my first shave with an open comb razor, man you can REALLY feel the blade, i have a merkur slant and a progress but the blade in either of these cannot be felt in the same way, gave me a great shave btw.
The open comb is a fine shaver. I use mine when I have 3 days or more of beard growth, and then I use it for my first, WTG, pass. I only do a 2 pass shave, so for my 2nd pass I use my regular safety bar razor. I use the Merkur Classic 1904 as my go to razors.
Ivan, congratulations on finding the goodness of the open comb. I use one every day.