I am not very happy with Perpetual Tech. Their web site (which is hardly ever updated) has listed speaker only correction for my speakers (Vandersteen 2ce Signature) as "coming soon" for six months or more. It is the same story with lots of other models.
I signed up for the mailing list from their web site (twice), but have never gotten a single email from them. I sent them the product registration cards for my P-1A and P-3A and never received any kind of acknowledgement. They answer email to their tech support (who are helpful), but otherwise do a lousy job keeping their customers up to date.
They advertise their products as being updatable via the internet, but they have never offered any updates online. I have heard third hand that the software in the P-1A/P-3A has been revised, but good luck finding out what version of software you have installed, what the revisions are, or how to get them. It is not mentioned anywhere on their web site. Remember, this is a company that mainly sells direct via the internet. So it is resonable to expect their web site to have all of this information.
Then there is their room correction software. Where is it? Will it ever ship?
Perpetual Tech. has an excellent sounding DAC, but they are ruining their reputation by selling vaporware.