Running a 180* thermostat

My 99 Century has 155,000 miles on it with the original thermostat. I was thinking of changing it and running a 180* thermostat, instead of the stock 195.

Are there any drawbacks from doing this?

If you live in a cold weather state, you will not get as good of heat in the winter. It can also trip a P0128 code (thermostat opening below regulated temperature). If it's not running hot, leave it a 195 and not worry.