Paul,
a wonderfully figures bit of beech. you've done it proud, the flow of the curve around the form is smooth all the way, with no discernible shape changes.
The finish is a little high gloss for the size of the form, I find high gloss on small items works but not so much on large items but this is a personal taste.
The neck could have been on a slightly raised section, as a collar, it would have delineated it better, the flowing curve you've created is reminicscent of a potters work, again, this is a personal taste.