Parasound PSP-1500 as a normal Pre ... sensible purchase or not

Hello everyone

I can grab a Parasound PSP-1500 for pretty good money, but I don't know if it's worth buying this device to use as a simple preamp. Since I highly respect John Curl as a developer and this device has an extra button for switching to stereo operation, this makes perfect sense to me. What is your opinion on this, or has anyone had experience with the device in stereo mode???