I've been receiving Botox injections for years, and until now 20 units would last approximately 4+ months. They were running a special in December that was 30% less then what I was paying, so I jumped on the opportunity to save a little money.
The saying "you get what you pay for" definitely applies to the Botox that was used on me, as the effects lasted a mere 8 weeks!
When I asked my plastic surgeon why this happened, he said the vial that was used was probably diluted.
I would not recommend Perfect Skin Laser Center.