I have an assortment of Merkur razors and this is the progression of difficulty for me. YMMV is always the case in something like this. For simplicity, it's the same whether I use a Derby or an Israeli Personna. Feather Blades are a different animal. From easiest to hardest. Merkur HD Classic --> Merkur HD Slant --> Merkur Open Comb --> Merkur Futur. The HD Classic is my GO TO. When all else fails, I go to this razor for solace. The HD Slant is my workhorse. It will give me a really good shave day in and day out. Slightly more care is needed than an HD Classic. The Open Comb is my BBS razor. If I'm feeling confident enough about my technique I can 1 pass with clean up with this razor. Focus is needed for this razor or it will get you. The Futur is my best and worst razor. It will give me the closest good shave or the worst. My technique must be at the top of its game or this razor will tear me up. Not bleeders or weepers. I get those from any razor when I do something really careless. No, it's the wicked red patches and ingrown hairs that get left behind on my neck and chin. Much cooling and soothing is required with a day of using the HD Classic to recover. I do not do ATG with this razor.