The triples are really good ones. I never tried the doubles but read in another forum that they should be not so good. There are some people that got a bloody head using them.
If you have the black adapter the triple Sensor blades (or some substitutes from other suppliers) fit too and they are doing a good job.
I'm right now using an original triple, it has about 6 shaves now and still working fine. I think it will make 2 to 3 more turns.
But this depends on your hair...
If your blade doesn't work after two shaves...maybe it's clogged? The stubbles tend to stick between the blades and then it seems to be dull. For a basic cleaning I sometimes use a water pick, this works fine for me. And meanwhile shaving often wash it out under a hard jet of water, works best in the shower.
