My experience so far with a 2.0 ohm hh357 - I've been using it a little over two months. It performs as well today as the second day I was using it. The first day wasn't so impressive. It broke in in about a day though and has delivered an incredible vape ever since.
Flavor and vapor production are great. I do not agree about VG being the culprit for decrease in performance, though it could be some flavorings. My hh357 has only been used with two juices and both are 100% VG. I dripped about 15 ml of AVE Flue Cured when I got the atty. After the first cleaning, I switched it on to my REO which always contains my most often used juice - AVE 555 - and that is the only juice that atty has seen ever since.
I kept it on my REO for a little while (maybe a couple of weeks) but I really struggled with it. Even the slightest overfeed makes this atty spit. At least twice a day, I would over-squonk a little and the resulting juice in my mouth was incredibly frustrating. So, that atty went back to dripping for a couple of weeks.
Then, I got my VVPV. If there was ever a better match, I never found it. Two pumps = perfect amount of juice for the hh357. So, my VVPV is set somewhere close to 4.5v for the 2.0 ohm hh357 (sometimes I turn it down a little to maybe 4.2 or 4.3v) and every so often I press the pump button twice. I can keep the hh357 right in the sweet spot indefinitely. Billowing, flavorful, warm clouds of vapor all day long.
My hh357 does leak just a little bit. It isn't bad, but it does lose a little juice and has done so since I got it. I would say it is less prone to losing a little juice than any regular 510 I've ever used, but it will leak a little bit. I do use a drip shield and I am happy I have one for this atty.
I have followed the care instructions. Cleaning is just a high-proof vodka bath and I never blow it out from the open end - just the connector end. I give it a vodka bath and blow out about every 6 days or every 30 ml, whichever comes first. The only deviation from the cleaning instructions has been that I left it to soak overnight a couple of times when I forgot about it and went to bed.
The hh357 produces a lot of vapor and probably the best flavor of any atty I've used. If I were continuing to use it on a 3.7v PV (which I am not), I would like to see some intermediate ohm rating between 1.5 and 2.0... Either 1.7 or 1.8 ohm would be really nice.
Is it worth the price tag? In my opinion, yes. I have gotten a couple of months and then some so far out of this one and I feel like I got my money's worth. If it had died in a couple of weeks, I would say no. Even though it offers superior flavor and great vapor production, I would be happier with other attys I like if the hh357 didn't last *and* perform well for an extended period of time.
