Pros:
This is an older course, and it has stood the test of time. Many courses have come and gone, but D.F. Buchmiller stays popular among the local players, and gives new players a great place to learn the sport.
DFB is a nice, short, walk in the park. Not far from the inner city, this is a great place to stop and throw quickly after work, during lunch, or to beat the weather.
The par 3 style is fun, relaxing, and an important course type. While it isn't a top of the line course, the ace runs and shot-shaping required on a course like this make it worth playing.
Nice concrete tees and Discatchers, a standard format, but one that does not need changed. Quality stuff!
Cons:
DFB is a crowded course, with a lot of hustle and bustle, some holes play close to another, there are holes that play near other park activities, and the road, making safety one of the most important things here.
The holes are mostly easy, shorter par 3s with not a lot of challenge, which, again, is fun, but not the best championship style layout.
Some of the equipment is getting outdated, like the secondary baskets, and the tee signs. The navigation can be a little tough for the first time through, so a map is helpful.
Other Thoughts:
This course is fun, but not spectacular. I'd compare it to Schenley Park (a Pittsburgh course) with less woods, with the large crowds and older style.
This course serves it's purpose, and I love to play them when I have the time, but it is not the best course in the Lancaster area.