Yes, if you give all of those details they will be notified.
It is realyl appreciated as it does come into play when going for a promotion or other 'step-up' role or when progressing to business/first. It also helps should something go pear-shaped later on, a good track record of compliments always provides balance.
I have been provided with several (de-identified) handwritten notes given to the CSM by passengers. Some of them have been given directly. others were emailed via management or customer care departments.
Care to share what you found commendable on your flight? We can always do with positive stories around here
If not, thanks for taking the time to thank your crew for making you happy!