As @BLaKSmith said the choices are mind boggling! I can only give you my recommendations, from my own experience.
I started off on the cigarette look-a-likes like you. I had the Green Smoke e-cigs, with replaceable cartomisers. A very good quality vape, but the lack of choice of flavours (didn't want tobacco) drove me down the refillable e-juice route.
My next e-cig was the Innokin VV3.0, a variable voltage and variable power semi-mod (I say semi as the battery is non replaceable). It takes both ego style clearomisers and 510 clearomisers. Battery life is good for me, 3-4 days. Very nice unit, goes up to 11W, small and stealthy, still use it occasionally.
I have now stepped up to a full electronic mod, The Beyond Vape Spire. Designed in the US, built in china, and QA'd in the US. Very nice mod, moar power, goes up to 15W! Takes ego and 510 clearomisers, and looks better with larger tanks. Takes all 18xxx series batteries. Hoping it will last me a long time. I bought an Aspire Nautilus clearomiser tank to go with it, and the vape is sublime, great flavour and clouds!
As others have mentioned, you could use a few drops of e-juice in your PNP bullet to mask the smell when you are using it.
Beware of cheap ego clones and cheap chinese mod clones. You want something that won't leak and fall apart, and you definitely don't want something with dodgy batteries!
Hope this helps!
Sorry for the off topic guys.
You might wanna watch out when putting a high nicotine juice in a herb vape, it might change the throat hit from weed cough to throat choke, and as for clones not sure on electrical ones but my mechanical seems well built
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