I tried Guide7 when I first got my AP 600E a couple of years ago. I
found that when using the LX200 protocol that the scope wouldn't stop
slewing at all. The scope just kept going around and around and
almost hit the pier! I haven't tried using Guide7 for slewing the
scope since.
There are some critical subtle differences in the way the protocol is
used by Astro Physics. Chris Marriott and Dave Lane had to make
changes to get their programs to work. (Very wrong of me to mention
the competition.)

--- In guide-user@y..., Bill J Gray <pluto@p...> wrote:
> Hi Mike and James,
>
> Select "LX-200" in Guide's telescope control setup, and you
should
> be all set. As Mike suggested, the AP protocol is quite similar to
that
> for the LX-200; the subset of that protocol used by Guide should be
> understood by AP scopes.
>
> (I should qualify that slightly: I know the 'slew scope' and
'slew Guide'
> functions will work. I'm not so sure about some of the other
functions,
> such as those to set slewing speed and the 'slew' arrows and stop
> button. Those _probably_ work with AP scopes as well as with LX-200
> compatibles, but I dunno if anyone has actually tried them out
yet.)
>
> -- Bill