If you are using it as a "Trying to quit" device, I'd definately recommend the Bloog for ease of use and a close to smoking experience. Both the Bloog and Ego have their pros and Cons which I've given a general overview below:
Bloog
Pros:
- Looks and works like a Cigarette
- Easy to fill
- Almost no learning curve
Cons:
- Shorter battery life (vs Ego)
- If you are not careful filling carto you can kill the auto battery
- Cartomizer systems can be a little more pricey long-term
- cannot direct-drip on an auto battery
Ego
Pros:
- Longer Battery Life
- Huge amount of options for accessories
- Can Direct Drip, Use Atty/Cartridge/Tank systems or Cartos
- Atty/Tank systems can be cheaper long-term
Cons:
- Steeper learning curve
- Huge amount of options for accessories (I know I listed this as a pro as well LOL, your wallet will decide which it really is)
- Some users find it "heavy" in their hand
- Does not look like a cigarette
Cartomizers vs Atty / Cartridge / Tank systems.
For a first time vaper, I personally would recommend cartomizers for thier ease of use. For the Bloog, it's simple, just buy the Bloog Cartomizers. Those Cartos are near perfect for ease of use and reliability. For the Ego, I'd stay away from the XL (Fillerless) Cartos to start as they have a learning curve all their own. I'd go with LR Cartos from Happy Vaper, these are pretty close to the Bloog.
Atty/Cartridge systems take a little more tweaking to get to where it's 2nd nature to you, and Tank systems can be frustrating if you happen to get a bad batch of tanks, or wonky Atty out of the gate. I know some people swear by them, but they have their problems.
As for what to buy to start:
Bloog is pretty simple. I'd buy a basic starter kit, or PCC kit (Depending on your budget) but make sure you have at least 2 batteries so you can have one to use while the other is charging. Battery lasts around 2-4 hours of use. I'd pick up a couple spare sets of cartomizers as well.
Ego - Get the basic starter kit, it has everything you need to get going (2 Bats, Charger, 2 Atties, 5-pack of cartridges, cloth carying case). Recommendations - Pick up a 5-pack of LR Cartomizers. They are very easy to use and fill (like the bloog).
As for pre-filled, it depends on where you are buying your kit. If you're purchasing from Happy Vaper (Which I would personally recommend) you should also buy a SAMPLE PACK of juice from another vendor. Happy Vaper does not sell Nicotine juices, and honestly if you're trying to quit, Nicotine goes a long way to the success. If you're purchasing from another vendor, they may have options to get pre-filled with Nic.
Pick a few different flavours to start out. I can tell you, flavours are completely subjective, and it will take nothing but trial and error to find the one that works for you. Be patient.