First of all, the packaging: each dosage comes in its own separate sachet, a flat silver strip measuring approximately 4 inches by just under an inch, which makes it easy to take the sachets with you in a pocket or purse when you go out and about. So it's neat and, in theory, convenient.
Second, the use: inside each sachet is some powder, very similar to the old lemsip powder that you took in the same way (you just pour it in and swallow). You take this sachet AFTER a meal. The taste is okay if a little too strong - it's 'red berry' flavour - but I must admit I didn't enjoy this manner of taking a dose. As soon as I poured it into my mouth the dryness of it stuck at the back of my throat and almost made me choke, then the sweetness almost made my eyes water. I kept trying it but sometimes I really had a coughing fit due to it just sticking at the back of my throat. The powder gets stuck around your teeth, your palate, your throat - it's horrid. I really don't get how this is an improvement on taking a tablet - yes, I dare say it will be absorbed into the system a little quicker, but not if it gets trapped and makes you cough it straight back up!
This is also a problem that undermines the idea that you can take these sachets anywhere - you can't take them surreptitiously, and if you tried it in a restaurant or cafe you'd probably end up with someone attempting the Heimlich manoeuvre on you!
I think the least-worst way to take a dose is to pour the powder on to the tongue and then wash it down quickly with a sip of water.
Third, the impact: It's hard to tell if this actually does any good. If you don't eat sensibly then it certainly won't produce good results, and if you do eat sensibly, and exercise, you won't really need it. As a placebo it will probably help you to discipline yourself because the routine will focus the mind on your diet, but otherwise I'm still sceptical about it.