Puffpuff, Health cabin may take a bit to get to you they are from overseas and have to clear customers. Also you might want to look at and Ego-t (it's not cig - sized like the 510-t but the battery is 3x the life).
If your a heavy smoker(pack a dayish) and decide to go with the 510 models plan to carry a couple of spare batteries with you when away from the house for a while (i.e at work, or out for the night). Also batteries take a while to charge. -- So order spares (and possibly a second charger), keep 'em charged.
510-T tanks hold about .5ml Ego-t tanks about 1.1ml. Pack a day smokers in my experience (more than just me) seem to settle in at about 2ml a day at 18mg.
555's- are typically is a tobacco blend with nutty undertones.
You will also see comments about:
"Sweet Caroline"- A blend only available at ivape.net - Most people relate it to sweet tea, I like it, but I seem to need to clean my equipment more often when I use it.
Virginia: Fire Cured Virginia Tobacco
Ry4 - kind of a spicy tobacco, an acquired taste.
Cowboy: Marbrol, kind of....