We took the southeast Superchargers from NC down to Cape Canaveral to watch the CRS-4 launch this weekend. I've used the northeast section a couple of times to get to southern PA and Manhattan without a lot of incident, but probably did more "research" the first time or two, and got a little lazier with preflight preparations this time.
Tesla really needs to look at providing tailored last-mile guidance to Superchargers on the nav screen.. A couple on this route are a little hard to find the first time, particularly at night. The web pages help, but reading them ahead of time really shouldn't be a requirement. Navigating to an address is one thing, buildings tend to be fairly visible even if the marker is off a bit, but unlit superchargers in the corner of a parking lot inside an outlet mall are a different story. Maybe the new lighted stations will help once they roll out, but who knows when they're going to replace the existing stands.
The stretch from Savannah to St. Augustine is a bit of a stretch, it's doable in an 85 (though on the way down I must've looked at the birds-eye nav distance before it finished calculating the route, left a little sooner than I should, and ended up stopping at a L2 charger outside of Jacksonville to add about 6 miles cushion when the weather started acting up) but would be cutting it close on a S60 in anything other than ideal weather. On the other hand, Santee to Savannah and St. Augustine to Port Orange are both on the short side, one another 60 miles south of Savannah would close that gap for 60s and allow 85s to potentially skip over Savannah and St. Augustine.
And lastly, it'd be nice if they'd put charging either at the KSC visitor's center parking lot or some hotels in the area; after the scrub Saturday morning we ended up going back up to Port Orange Saturday evening after visiting KSC so we'd have enough for launch #2. Titusville itself is something of a charging desert, and for all the signs at the KSC visitor's center about going green and having solar everywhere, they have no public charging for guests.