I was a pack-a-day camel smoker for 10 years before I got into vaping. I started with a Blu (Rebranded l88) but that wasn't doing it for me...got a KR808 and haven't wanted a "real" cig since. Good battery life (make sure you get a starter kit that has 2 batteries) and great throat hit (depends on the type of vapor you use- experiment and see for yourself!)=no more want for a cig.
When you order a starter kit, also make sure you order some spare blank cartomizers and some e-juice- what works best for me is to have some high strength (24mg) liquid on hand for when I have a real "craving" and keep some 6-12MG strength liquid around for pleasure vaping (the e-cig world's word for "smoking") in between the high strength stuff. That was I can get my fix if I need one but I can also vape all I want without dosing myself.
Your throat hit (how much it feels like smoking a cig) will depend a lot on the type of liquid you are vaping- in addition to the standard wisdom that PG based liquid gives more throat hit but less vapor and VG base is the other way 'round, I've found that the flavor of the liquid itself can influence throat hit- some are more mild than others. All other things being equal, I've found that sweeter liquids have less of a throat hit, wheras herbal, bitter, or sour liquids have a pop. That's not to say that sweeter liquids are bad, I vape FSUSA's Cola flavor like it's going out of style and it's a very sweet, mild vape. But when I really want my fix, I go for a high (24MG) strength, herbal flavor like Clove, or even a spice like Apple-Cinnamon. Really hits the spot for me and keeps my want for cigs at zero.
Anyway, best of luck to you both! LOT'S of people on this forum have been in your shoes and are really willing to help!