I first bought my Volt with the 5-Volt Passthrough they originally sold. Keep in mind I've been using V4L's 5-Volt Passthrough with their ClearCarts for over a year. In the meantime, I've been keeping an eye on Bloog. I even started an order to try some of their cartos. When I got to the point of the ordering process and found out how much the shipping was, I thought - Now, that's just crazy! So I didn't finish putting an order through. I even wrote to them and told them what I thought about their shipping costs. I was polite, but I never heard back from them.
Then I started seeing Volt ads. So I bought some Volt supplies. Since the Volt cartos are so different from V4L's, the hit was just way too hard at 5 volts. I couldn't even taste the flavor. I talked to Rob about my problem and next thing you know, they have a very well made 3.6 volt Passthrough that works perfectly with the Volt cartos!
I exchanged the 5 volt Passthrough for the 3.6 volt one and have been giving it a good workout for over 5 days now. I probably refilled the same carto about 40 times too. I just now noticed it wasn't giving very good flavor anymore and it was time to open a new one, but it seems to work just fine otherwise. Maybe I'll even try washing it, in the name of science, but don't hold your breath.

I hate cleaning just about anything. I do clean my batteries and passthroughs once in a while though.
I have been "vaping" for over three years and I still have not been convinced enough to buy a Mod. I really don't see what the big deal is about high voltage batts - especially since we now have lower ohm cartos. I really can't tell the difference between a high resistance carto at 5 volts and a low resistance carto at 3.4 - 4 volts. I am one of the few "oldies" who don't drip, but prefer cartomizers. When I'm at home, I almost always use a Passthrough - like a pacifier. I don't plug it into my computer though. I don't want to chance frying my laptop. I use a USB wall plug, rated at 5 Volts, 2000 mA.
So, I feel very confident in recommending Volt to any smoker or vaper. And I'm especially happy with the Passthrough!
I really like to have a backup at all times, so I'm patiently waiting for the blank cartos to arrive so I can order another Passthrough along with them. As far as I know, Volt is the only company who makes a very well-made 3.6ish Passthrough without messing around with an inline battery. I am most impressed!
Thank you Volt!