I decided to purchase pet insurance after Ivy, one of our tabby cats, ran up her favorite tree and slipped off, suffering a badly broken leg. The ER and vet bills were steep, but we paid up because Ivy is a member of our family.
Since then Ivy has used up a couple more of her "lives" requiring ER visits and ongoing veterinary treatment. On each of those occasions, I submitted her bills to ASPCA and have been very satisfied with their response and reimbursement.
I highly recommend this insurance for anyone who loves their pets and doesn't want to be faced with a tough decision about their care options in the event of accident or illness.