I signed up through Groupon last week. I got a deal-six months for $29, and I made sure my vet honored it first. Turns out he is the only one in my county that does!
I would imagine that I will definitely get my money's worth, especially since my boys get a good nail clipping and anal gland tune-up every month, or so. I wish the discount extended to take-home meds, but I'll take 25% off in-house any day!
The family plan is for up to four pets!