I have used PetPlan for 7 years and it had been very easy to use with prompt payment (until last year when claim time increased to 3-4 weeks). My 4 cats had 90-100% coverage with a $200 deductible and $22,000 annual maximum, and for 2015-16 prices ranged from $350/yr for 5-6 year olds to about $580/yr for my 12 yr old. I just went to renew and what was a $200/100% plan for my 7 year old cat increased from $368/year to $1164/year for $250 deductible, 90% coverage and $20K annual max. (They no longer offer the 100% option.) Chatted online and they said they had been undercharging, then gave a song and dance about how there were now lots more options for deductibles and coverage amounts (actually worse options).
I've switched to Healthy Paws. $420/yr for $250 deductible, 90% coverage, and NO annual or lifetime max.