You turned me on to something I didn't even know existed. I just had to order one of those.
Which? The razor or the brush? Or, hopefully, both? I switched to double edge razors a year ago. It's one of the best decisions I've made. I get fantastic shaves with them, and it really helped my skin to clear up. I went a little overboard and started collecting them. At one point I was up to about 30 razors until I picked up the one pictured (a Merkur Progress with custom handle and adjustment knob, if you're wondering). Among my collection are razors from 1917, 1919, 1923, and a smattering of Gillette razors from the 40's through the 70's, including a very nice Gillette Super Adjustable from my birth year (1979). All of them are fantastic shavers. In addition to being great shaves, blades are dirt dirt cheap. Depending on what blades agree with your face, you can easily get 100 blades for under $20. With a little searching, you can drop that number down near $12. I've got about 200 Feather blades, 100 Derby, and 100 Astra. I spent about $70 total for them. At the rate I'm using them, I should be good on blades for about 3 years. Try that with a Mach 3 or a Fusion and you'll come up way short. Do yourself a HUGE favor and check out the wetshaving videos by Mantic59 on Youtube. It'll save you a lot of aggravation and razor burn and teach you some proper technique to give you a better, smoother shave. Also, don't be afraid to try different combinations of stuff. Some razors work better with some blades than others. And stay far away from Merkur blades. Their razors are very nice, but their blades are overpriced trash.
Ok, done being off topic.