Pros - Inexpensive, great flexibility, and long lasting. Had the last pair for 2 years. Decent overall tone.
Cons - Tonal inconsistencies between strings.
These strings are pretty darn good and were the main strings on my 55-94 for years. I'm the "if it ain't broke don't fix it" kind of guy and thought the volume and tone inconsistencies between the strings were a technique issue. The G string is more harsh sounding (upper mids) and the B string is much louder and woofier than the rest. GC didn't have them stocked one time and I ordered a set of La Bella Rx strings and was pleasantly surprised. Similar price range as well.
Pros - Soft feel. Smooth on the left hand fingers.
Cons - None so far
This is my first set of Sunbeams, but not my first set of DR strings. I was looking for a softer, smoother string to put on my Jack Casady. I did a ton of research (maybe over-thinking), as I was kind of looking for something brighter that flats, but smoother than the metallic sound of regular round wounds. I even tried GHS Ground wounds on my Epiphone Zenith, but wasn't crazy about them.
The Sunbeams have actually worked out quite well. They are not as rough feeling, and the round core does seem to make them more flexible, thus easier to note. I definately like the sound and tone of them on my Casady, and they seem to be lasting good.
I went with Medium-Lights because I wanted the benefit of light gauge strings, but I wanted the heavier "G" and "D" strings, and again, this turned out to be a good choice for this bass. I don't miss the heavier gauge A & E at all. The bass sounds great, plays easy, and the string noise is minimal, I get none of the usual clankiness of rounds wounds, or the thud of flats. A perfect balance of what I was looking and hoping for in a string set for this bass in my application.