I have been using specs for the last 25 years and have been using either Carl Zeiss or Crizal lenses. 6 months back I happened to change to Titan Eye Plus. I can vouch see that Titan Lenses are too inferior to the other 2 brands.
The first bad experience with the Titan Eye Plus was that when they got delivered I found that the positioning of the lenses was not in alignment. Upon complaining it, they told me to use it for a week, then I would be adjusted with it. I tried but in vain. Then with much reluctance and after many visits they replaced it.
Within this short time, both the lenses are now full of scratches, even local lenses give you a better quality.(I am even to sure whether because of the replacement, they gave me an inferior product)
In future I will go for either Carl Zeiss or Crizal for sure.