Not sure if you have gone for e-lites brand, if so you can go for light cartridges as the regular ones can be strong.
Agree with previous post about effect fading after a day or so with the hit and vapour not being as noticeable - cost is an issue anyway but my motivation was harm reduction...
Moving to E-cigs won't help you quit altogether, and they aren't sold as a quitting aid. They are sold as "damage limitation" aids whereby you won't suffer from inhaling tar, tobacco and all sorts of other rubbish.
You are and still will be addicted to nicotine but nothing conclusive on long...
For my first post on NSC (long time reader!) I would echo the above and fully recommend E-Lites. Also, you get 20% cashback if you click through on Quidco!