My review for this latest installment in the Splinter Cell franchise is well overdue! To cut it short: It's an excellent game. It was the first game I played (upon release) that had the enter/exit cover option, and in the beginning I wasn't sure if I liked it, but it definitely grew on me. It allows for superior tactical planning.
You definitely have a choice here how you want to handle a mission, and you can tailor your load-out to match. I find that I usually prefer a good medium between stealth (ghost) and silent takedowns (panther). The third option, assault, ultimately turns into chaos and that is not really how a Splinter Cell (by definition an operative who is a silent infiltrator that has the freedom to choose on how to proceed) works. I find that a non-lethal takedown usually works quite well, but there are situations in which pacifying a room permanently, is definitely a good plan (e.g. hostage situations) if safe to do so and if the mission parameters allow for it. There are definitely some targets tht need to be captured alive!
During the game you will have the option to upgrade your gear which will also provide you with much better intel while you're deployed, and will give you better abilities to protect yourself. Spending available Uplay points on available suit options is also definitely helpful, if you're pondering that. They're both worth it.
Some have complained that the "execution" system (you gain up to three points for silent takedowns which you can then use to automatically execute marked targets with a headshot) is making things too easy, but ultimately the truth is that you have to work for that option to become available and it is not an automatic "recharge". You will, however, find several weapons crates during a mission that will allow you to restock on ammo and gadgets.
If you liked any of the previous Splinter Cell games (and if you like tactical/stealth/military games I can't see why you wouldn't), then this is definitely a recommendation. Get to your next best (online) store and exfil with this game. Mission accomplished.