Pros:
Bay Oaks is an interesting course with a layout you're not likely to see in too many other places.
On the positive side, the park itself was very well manicured when I played. The baskets were all in good shape and easy to spot. While navigation is not always clear, the baskets are aligned in a logical order, so you can figure things out for yourself without much difficulty.
I doubt this course sees a lot of traffic, so you should be able to play at your own pace.
Variety is pretty good here. There are a couple opportunities to use your driver, and various obstacles force you to shape your lines carefully.
#18 is a pretty cool water hazard shot to a basket protected by some hedges.
Cons:
The layout here is hilariously dangerous, and the majority of holes are only playable when nobody else is around. It was a ghost town when I played (weekday evening in late May) so maybe this is the case often. Tee shots go around a tennis court, right next to a playground, two shots over a parking lot, directly over a basketball court, and a couple over sidewalks. Aside from possibly endagering non-DGers on basically every tee shot, these obstacles can beat up your discs pretty quickly.
I found tee signs on only a couple holes, and you're pretty much on your own for navigation since there are no teeboxes. Little wood plans in the ground serve as a makrer, but these can be hard to find. As I mentioned in the Pros, you can see the next pin from almost every basket, so it's not impossible to figure it out for yourself.
Other Thoughts:
If you're on the island you're probably there for reasons other than disc golf, but it's cool to have the option of packing up early at the beach and discing.
Despite the low rating, it's worth checking out if you have the time, if for nothing else than the novelty of the layout. But again, this place is most likely unplayable if you go when other areas of the park are in use. Check it out with that caveat in mind.