Anything is better than PTCL but there is not a lot of info in the market regarding Optix's customer service/reliability.
That said, they have done some good work in laying the fibre cables in Askari 13 and 14 of Rawalpindi. Plus their installation costs are one of the lowest in the fibre market, with competitive packages.
I'd say give them a shot if you don't have Transworld or StormFibre in your area.
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