I looked at several kits, and realized I could get all the stuff I needed less expensively ordering separately, although I can also get plastic labware free from my husband's work (don't tell anyone). Some of the stuff in the kits didn't seem necessary, like a funnel or a graduated cylinder (can't remember exactly what was in all of them).
I got some Loranne flavors from a local cake shop to start with, so I didn't have to pay shipping for those. VG I got from a drug store. PG and nic I ordered from online. I was going to get some little bottles, but then I realized that by the time I get my nic I'll have a couple of empty 5 ml drip bottles that will be empty. I might still order some from US plastics if I find I need more.
I guess a kit would be okay if you don't really want to think about or don't really know exactly what you need and what brands to buy.