Just bought a 4 pack of these triples at Wally's for under a buck per cartridge about a week ago ($3.97 for the 4 pack). They are adaptable to my Sensor, which I use on the face. I also have Sensor adapters for the HeadBlade.
I found that these cartridges actually give me a closer shave on the face with about the same risk of blood loss as the Sensor doubles.
For headshaving, though, I found them not to be very forgiving. Cut myself more than with HeadBlade triples or Sensor twins. Also, the lube strip feels like it is actually causing drag which makes the blade stand up at kind of an unfortunate angle, hence, the blood loss. Believe it or not I am paying close attention to keeping excess pressure off the blade and on the middle and back finger.
Has anybody else tried the Personnas? If so what was your experience with them like and can you offer any suggestions. I love the price, half what they want for the 4 pack of HeadBlade triples.