Though it is a competing product I have used it in a few cases where there was wow from a previous generation and unreachable, with some pretty mixed results. 

It makes everything chromatic, even if it's not. The clarinet gliss that opens Rhapsody In Blue will be obliterated, and will become a step-wise run. Very funny effect on a dive-bomb crashing airplane Sfx that suddenly crashed white-key-black-key. 

It tracks broad wow well, if the material is orchestral. Orchestral with vocal look out.
Solo instrument brutal, de-vibratos- dries it out. 

Tracks slow drift crudely -you tell it the root pitch (and guess at the amount it droops or climbs) and it builds a trend line and corrects to that moving center point. Still chromatic.

It's Autotune. No a priori reference, no finesse. 

Easy enough to use, easy to make a desiccated clean lifeless mess.
If the wow is more than a semitone it goes nuts and a lot of hand work is required, which they make fairly easy to attempt, but not with 100% slamdunk success - there were some passages it just couldn't manage.  
Algorithm sounds harsh.

Wow remains in silences, reverb tails. drum soli, a-capella voice is a nightmare. 

Other than that it's awesome.

Only necessary as a last resort when other means like ours can't be used. 

Please pardon the misspellings and occassional insane word substitution I'm on an iPhone
On Dec 27, 2013, at 4:39 PM, Doug Pomeroy <[log in to unmask]> wrote:

> Hi Karl,
> I believe the folks at Capstan will answer your questions if you ask them.
> I did have some slight experience with capstan in a demo version,
> and found it requires much user intervention.  The system shows you
> where it finds problems, but is not always able to fix them automatically.
> A good sense of pitch is an operator necessity.  
> It works better with some kinds of music than others (rich harmonies; 
> orchestral best) and goes bananas if fed applause.  No good on speech, 
> of course.
> I think it can be made to process gradually changing pitch over the
> length of an LP side.  A possible alternative: I believe Diamond Cut 
> software allows a curve to be drawn which will control pitch shifting 
> of a file (requiring trial and error).  The only other alternative is 
> Plangent Processes which works only with original tape recordings.
> Doug Pomeroy
> Audio Restoration and Mastering Services
> 193 Baltic St   
> Brooklyn, NY  11201-6173
> (718) 855-2650
> [log in to unmask]
> On Dec 27, 2013, at 12:00 AM, ARSCLIST automatic digest system wrote:
>> Date:    Thu, 26 Dec 2013 12:00:12 -0800
>> From:    Karl Miller <[log in to unmask]>
>> Subject: Capstan
>> Wondered if any of you might have experience working with the Capstan softw=
>> are.=C2=A0=0A=0AIs the learning curve as simple as it is the demo video?=0A=
>> Does it work well?=0AAre there less expensive alternatives?=0AWill it handl=
>> e a slowly changing pitch=E2=80=A6over the length of a side=E2=80=A6I am wo=
>> ndering about side changes of recordings.=0AHow long can a file be?=0A=0AAn=
>> y observations=E2=80=93thoughts would be most welcome.=0A=0AThanks.=0A=0AKa=
>> rl=0A