Arthur Stone put the WeissKlang V13 (with the V13 KlangFormer) to the test in an in-depth review on Gearspace (formerly known as Gearslutz).
Result: ★★★★★

“The V13 is a solid piece of engineering that will capture a great recording with a minimum of fuss.
The KlangFormer software is exemplary and perfectly matched to the workflow and V13’s linear but beautiful character.”