The 5 star rating is for the sample pack, which is excellent. It's a nice variety of blades, and if you can't find one (or more) you like in this pack, then wet shaving probably isn't going to work out for you. This let me order 100 pack of my favorite blades from the pack.
I'll give my comments on the individual blades in case anyone finds them useful, but keep in mind that your mileage may vary, so you should try these yourself. I should mention that I primarily shave my head, so your experience shaving your face may vary from my experience shaving my head. I will list them in the order I tried them, which seemed like a good order to me. If you're uncertain after trying all of them, go back and try them again, but these seemed like a nice order.
I should mention that I tried all of these in a Merkur 34C using Taylor of Old Bond Street Sandalwood Shaving Cream and a pure badger brush.
Derby: I used one for a single shave and never want one near my face ever again. It did not seem very sharp, and it felt like I was pulling the hairs out of my face. I tend to get very few nicks/weepers on my head, but this blade managed to give me an ugly one.
Red Personna: This was a pretty okay blade, and a decent sharpness/comfort level. It was entirely acceptable shave, though (as I'll mention), I liked others better. This felt a lot like the (Made in Israel) blades I had bought at Rite-Aid while waiting for the pack to come in; based on the feel and comments, I THINK they're the same blade.
Crystal: This was a very nice blade, which I liked a lot. It was quite smooth and sharp, and felt like it removed the hair pretty effortlessly. This turned out to be my runner-up blade, but not by a large distance, and I would certainly buy more. It was very good for two shaves of my head, and less great for a third.
Astra: This was my ultimate favorite, with a nice balance of smooth, sharp, and comfortable. I got a quite nice shave without any discomfort, and got three good shaves out of a blade. (I didn't try a fourth yet, but I'm curious to try.) The third shave was probably the tie-breaker with the Crystal for me. I just ordered a 100-pack from WCS. [Note: While lower prices are available elsewhere, WCS' service is fantastic, and given that we're talking about less than $20 (specifically $18) for approximately a year's supply (100 blades), I can't imagine buying elsewhere. Don't be a jerk; support small business, even if slightly more expensive, when the difference is inconsequential to you.]
Feather: These are as sharp as everyone says, and this gave me the closest shave. At the same time, I felt like I might also have removed the top layer or two of skin. I don't think that's an experience I want to repeat with any regularity, but if I ever needed the absolute closest shave possible (and I can't figure out why I'd ever need a shave closer than the Astra gave me), this would be my go-to blade. But it wasn't quite as pleasant an experience as I'd like.