We have 180 pts. at OKW and have been able to use them well. We've gone every year. Even stayed two weeks from before Christmas to after New Year's (when I asked my dh & ds to choose between 1 week in a 1bdrm or 2 wks in a studio, they looked at me like I was crazy, of course 2 wks in the studio). We've taken a 7 day cruise all on pts.; sent my parents on a cruise; gone to the Plaza in NY; brought my ds and 3 friends with us for a week and stayed in 2 studios. You just have to become creative in your point use and pick a use year that's good for you.
Good Luck!!! You can definitely enjoy DVC with 150-200 pts.