Here in NC, if it is a LPP system, then you have to have a certified operator (about $300 a year) to inspect system. If it is only a lift to a distribution box, then the certified operator isn't required. Call the local health dept and ask them about the existing system.
We have a pump fed septic system in Chatham co. We have a great slope, but because of the number of bedrooms - not bathrooms, we have to have a pump fed system. We have been here five years with no problems. In fact we had an inspection last year with 0" of sludge (she said she had never seen such a good system after five years). My parents have a pump fed system because their tile field is uphill. You may want to find out why they had to install a pump fed system, but I don't think it is a big deal.
Ours is set up with a pump up to a distribution box with a high level alarm. The only thing I would recommend is that you make sure the pump and alarm are on their own circuit. I think by code external plugs have to be gfci and our pump (and alarm) is on the same circuit as all the outdoor outlets. This causes problems when you trip the gfci and don't know it... I might need to replace it with one of those gfci's that buzzes when tripped.