After a bit of practice you can always get them to land on target. I carry 2 of these round and it is definitely one worth it!
Well make sure you get level 6 medical applicator. I have gotten it yesterday and its made the medic so fun and easier to play. You can revive from a great range, VERY Fast, and stealing revives from other teammates, and healing is fast too. You also don't need to chase down people you revive and heal them which is a huge plus. Well worth 500 certs, get it while double XP is active!