My personal opinion is that the Crosby is just a step up from Del Sur. It is not really geographically connected to RSF. The Bridges is a better but still isolated from the rest of the town.
If you can afford it, the Covenant is the best place to live in SD bar none. The location, the proximity to everyday life shopping facilities and jobs (along I-5 to the west and 56 and I-15 to the east), the setting and the privacy of the Covenant are unmatched. RSF town does not feature the most useful businesses but it is a nice place to go hang out during the W-E (expecially if you can walk there). The trails zooming through the whole town are just idyllic, specially if you are a nature lover. I can tell you that you will use the trails, especially if you have kids (horseback riding or not).
Again, this is not a snobbish statement, it is just my subjective feeling about the beauty of the place.
