I started with the Seavision tinted bifocal lenses and really wasn't that impressed with them. Also, Pearce complained that he couldn't see my eyes when he was taking my picture.
That was 3 years ago. I recently updated my prescription, and so opted to update my mask as well. This time I didn't bother putting in the coloured lenses.
In addition, although it wasn't a big deal for me, the tint DOES reduce the amount of light you get at night, even with a bright. This can be disconcerting to some divers.
BTW, Pearce FINALLY broke down & ordered a bifocal mask. Another Seavision (with the purge). He also elected to have clear lenses.
Just my $0.02's worth.
~SubMariner~