Very cool! My employer offers $600, and an additional $600 if you complete a 'Biometrics Screening' once a year. I unfortunately cannot claim credit for this like you can :)
My company's low deductible plans are currently a tax on people bad at math. Our deductible is only $4000 for a family. If you subtract out the $1200 that the company is paying for participating in the plan and getting a free wellness check, my deductible is effectively $2800. That $2800 plus a year's worth of monthly premiums is less than the family premium for our low-deductible plans. So, even if I hit the deductible, I've still paid less than someone who went on the low-deductible plan and never used it. At that point, my benefits and coinsurance are comparable to what folks on the low-deductible plans are getting, so there is really no way to lose. Once you factor in the tax savings on the out-of-pocket portion, the difference is even bigger.
High deductible plans with HSA accounts are awesome. Even though this has been a relatively bad medical year for a small, young family (three urgent care visits, got fit for new orthotics), we are still way ahead.
I am interested that your employer's share is only $700 different for high deductible versus a standard HMO or PPO. That seems awfully low. In fact, at my employer that difference is much closer to $700 a month than $700 a year. I suppose their standard coverage options might be crappy, they might cover a relatively low percentage of the premium, or it might just be that they have a fairly young, low-risk population and can get a better deal on the standard options (which isn't crazy considering the description you provided).