Got my stainless 510 two days ago and i really like it.
I use 901 carts on mine as i think they are better.
I only bought empty carts and fill them myself.
Overall i think the carts are the biggest problem, i tap pv against my hand before using it, that atleast seems too help the wicking a bit.
Have only been taking some puffs from an analog for comparisson and i find i like the 510 much more

My snus consumtion has also gone down by alot.
The problem now is i only got two batts and one pcc. My wife liked it so much she stole one off my batts and an atty (of course she took the best one ) and quit smoking
Really regret i didn't buy the pt.
Guess i have to order some more parts.
My mom was also really interested so i guess i'll have to order her some too, but i think the kr808 will suit her better.