I used a safety razor for the last two years or so. The shave quality is nowhere even close to even a cheap three blade razor. Cheap, but you can get (almost as) cheap and a much better shave with just about any modern alternative.
It takes a tad longer than a three blade razor, but I've always had closer and better shaves.
I've tried disposables, cartridges, electric and the safety razor and I'd rate safety razors better than all of them.
However, I still use a my Fusion daily, since it's so fast and efficient. With a safety razor it takes time to lather up and get a proper shave.