Do you regret reading the books before the series is finished?

I started reading around one third of The Name of the Wind and honestly I found the narrative very moving and well written, and I'd really like to finish the book and possibly the second one in the series. BUT!! I'm very worried that we are going to have a Song of Ice and Fire situation in which I read the series 10 years ago and still no book 6. This was very frustrating for me because if Winds of Winter ever comes out I won't remember a damn thing about the last book and will have to re-read it or something. So my question for this thread is: do you sometimes feel regret about starting the series befere is finished? Is it really worth investing my time?