Darryl C.
Yelp
23 Mayfield is a terrific B&B and totally deserves its great reviews (on other sites). I stayed in the Premier Jacobean 4-Poster room in February 2011 and it far exceeded my expectations.
I peeked into most of the other rooms at the B&B when the doors were propped open for cleaning in the morning and I feel that the Premier Jacobean room was far more luxurious than all of the less expensive rooms--it was more than worth it to pay a few extra pounds!
The other rooms had character, but felt small and quaint, while the Premier Jacobean made me feel like royalty--it's a very generously sized room with beautiful dark wood paneling, period prints in gilt-edged frames, and rich fabrics swathed over the massive four-poster bed. It even had classical music softly playing in the background (on a Bose Wave sound system) when I arrived. In short, it was even nicer than the photos I had seen of it--and it had a plush, solid, "they-don't-build-things-like-this-anymore" feel to it. I felt relaxed and luxuriant the entire time I was lying in bed or padding about the "gentleman's library"-like room.
The bathroom in the Premier Jacobean was great too, having just been remodeled with full Travertine marble and a huge, luxury shower. Like most European hotel bathrooms, it had a very contemporary style, which wasn't entirely in keeping with the bedroom, but it was nevertheless very high-end and nice to use.
The breakfast at 23 Mayfield was fantastic too (and is, of course, included in the price)--just go for all the Scottish meats (Haggis, sausage, black pudding, bacon) and poached egg...be prepared to be full for most of the day if you eat everything on your plate, though!
23 Mayfield is located approximately 25-30 minutes by foot from the Royal Mile, but it's actually more convenient than one would expect, as it's a straight shot (and only 10 minutes) by bus, which comes frequently and stops right across the street.
Finally, the thing that really distinguishes 23 Mayfield is Ross Birnie--he is much younger than your average B&B owner and is both very cool and extremely helpful. He's warm, friendly and has good recommendations for things to do and restaurants to eat at.
Speaking of which, I loved Whiski on the Royal Mile--terrific pub food (definitely try the sticky toffee pudding) and a great Scotch selection, along with live Scottish music most nights. Also on the Royal Mile, the Albanach was nice as well (and has a lovely Scottish dessert called Cranachan). Bow Bar near Grassmarket also had great cask ales. All of these places were not far at all from the B&B--I was able to walk off the Haggis, pudding, ales, and Scotch at night by returning to 23 Mayfield on foot.
Ross recommended a down-home Scottish restaurant halfway between 23 Mayfield and the Royal Mile, but I didn't have a chance to try it, as it was closed every time I went by...unfortunately, I can no longer remember the restaurant's name, but ask Ross about the place that serves food "like his grandmother used to make" and he should be able to direct you :)
My only regret was that I couldn't stay longer at 23 Mayfield...they book up fast, so make sure you reserve either of the Jacobean rooms!