Theres many many pros to going with at he subbox kit.
1.you can subohm but dont have to. SO you can start without sub ohming, and have the .5 coil there to experiment with so you can decide at your liesure if sub ohming works for you without having to go buy more stuff. Plus the mod will work for subohming
SO you have choices there and flexibility
2..the tank itself is easy to use and work with
3. the mod itself is VW so you can experiment with that without buying a new device when your ready
4. the mod and tank are small easy to handle and pocket friendly
5. If you ever decide to try and build you own coils, you have the deck form the kit right there to experiment with. But you dont ever have to use it if you dont want to, you can just buy pre built coils.
The important thing to keep in mind if your totally new to this is there are many ways to vape, this kit gives you some serious flexibility which can be overwhelming.
So if this is all new to you, start with the 1.2 ohm coils only set the box around 10 watts experiment with the wattage up or down a few watts, and find a juice or 10 you like. Don't worry about the .5 coil and sub ohming to your comfortable with what your doing and feel ready to have lots more clouds in your mouth and all around you. Sub ohming is nice for many of us, but its not for everyone.