Not interior, but I'm painting my front door with Aura *Exterior* semi-gloss and I'm loving it. NICE sheen, and it goes on fast and clean, levels well as it dries. Makes me look good :)

My main concern is durability, and he says that his clients are liking the Aura cabinets better than ones done with the Satin Impervo. I feel very nervous about the painting of the cabinets!

Yes, the durability is better. The thing about Aura is that it's harder to apply than Impervo because it dries so fast. But, if you can handle the application of Aura, it's certainly the better choice.

I have painted three kitchens with Impervo Satin, using Zinser oil primer. I used Penetrol oil paint conditioner all three times. (painters best kept secret) I used this primer over high gloss "Wetlook" Porter paint WITHOUT ANY SANDING in my current kitchen, which I painted 6 years ago and it still looks brand new, with no chipping.
I have also used Aura Satin enamel on baseboards in three rooms last Fall.
The bedrooms don't get much use so I can't say whether it will hold up as well as Impervo. Seems to me though that unless you can put an "extender" in it, that it would be hard to get the smooth finish that one can achieve with Impervo. I am in the process of painting some paneled closet doors with the Aura enamel. I have to paint the inside of the panels first, ...let them dry, and then finish the rest. No problem though because it dries very quickly. I think they may have an "extender" made for Aura paints now. If you go that route, I would check into that...Good luck! :)