Well, while I read an isolated issue of F&SF a few years back, this was my first subscribers issue, and given the post to the UK apologies for the delay in commenting!
Anyway, some very quick feedback from a long-time Interzone/newbie F&SF reader:
THE FIRST EDITIONS - Loved it! Slightly sentimental at the end perhaps, but a bizarre yet compelling narrative, and a story which will stick in my mind for a long time.
FIVE THRILLERS - Slightly bitty (as one might expect), and the resolution didn't really do anything for me, but some of the earlier chapters were fantastic. Not sure I'd define these as 'thrillers' mind!
THE NOCTURNAL ADVENTURE OF DR. O AND MR. D - To be honest I found the whimsical style of this story rather annoying, so this wasn't to my tastes. Interesting to observe reading some of the online reviews that some people didn't even seem to notice these were the ghosts of John Lennon and PK Dick, which must really have confused them! WHo was Doris though?
THE 400-MILLION-YEAR ITCH - Pleasant enough, though not having read any of the other tales in this series I may well be missing a bit here.
RENDER UNTO CAESAR - A topic worth exploring in fiction, but this was really too short to be anything other than a quick joke.
THE FOUNTAIN OF NEPTUNE - Atmosheric writing, but I can't say it really moved me in the end.
All in all for my first issue I thought this was very strong stuff - no real bad stories, and pretty much all of them had something of interest in their favour. If the rest of my subscription issues are as good as this I'll certainly be renewing....