I am using miktex and Yap with whizzytex (and cygwin),
I am very much impressed with this great combination.
You can actually get WYSIWYG in the Yap window while
you type in your (x)emacs. That improves latexing speed
There are some features that would make this
combination work even better.
If Yap would be 'open' for DDE communication with a
new topic updating its window at request (or easier
have an option to continually check if dvi file changes
even when yap doesn't have the focus). At present I
send a windows message requesting the update (KEYDOWN
F5). That introduces an annoying flickering.
If Yap would be more forgiving when not finding its
dvi file and NOT BLOCK with a modal dialog box when it
doesn't find the dvi file (maybe just a status message
or whatever). It would happen sometimes that Yap would
not find the dvi file as whizzytex is updating the file
to reflect changes in your editor but it would be
available very quickly after.
I am working on moving whizzytex completely out of
cygwin (a native port) so making Yap adapt a little to
whizzytex would be of great benefit to many, I would
think. I don't have MS Studio 7.1 otherwise I would
work myself on some of this adaptation and submit them
for approval. I think the modification needed to yap
source would be quite minor actually.