Pros:
Free. Somewhat varied terrain: woods, open grass, over water shots. fairly easy to make par on most holes. Helps to develop a repertoire of required shots.
Cons:
somewhat short, needs maintenance. first timers will get lost.
Other Thoughts:
It seems the biggest complaints on here are about the course needing better marking, maintenance, and trash cleanup. I agree with most of that. There is an effort underway now to redo the mini-maps, mark the pins, add 'next-tee' signs and improve the general condition.
One issue is that the course is free and in the middle of a town park, so kids and teenagers hang in out in there and leave trash all over the place. Golfers leave beer bottles and cans everywhere. If we as a golf community would pack out what we take in, half the problem would be solved.
Overall, Amesbury is fine course that helps develop a good overall game, maybe not real bomber shots, but lots of in-and-outs. I have no problem recommending this course to everyone. If you need a guide or some 'local advice' hit me up with an email. I am always up for a round.