Question:
i need advice on these 3 are they really that good
are they okay for 24 year old age group
just some info on these would be very helpful
thanks

Answer:
I was blown away by Body Kouros, was expecting a horrible stinky juice like the original Kouros but what I ended up with was a nice, candy soft aura similar to Lolita Lempicka Au Masculin which is a definite favourite of mine. I would deffo reccomend it, unfortunately I cannot help with the other two.

Answer:
For me Geir was a little too "strong". Don't know Body K. Lanvin is warm, a little on the sweeter side, and pretty unoffensive to others. Good luck!

Answer:
First of all there are no sure things in fragrance. So any blind buy, no matter how well researched stands a good chance of being a bad one. I typically advise people to only do a blind buy if they get an exceptional price. If you can wait and get the same deal, then take your time and test before you buy.
I've tried two of the three you mentioned.
Gier is an interesting fragrance. I had a bottle but got rid of it. Didn't hate it, just felt there was much better out there. It mixes fresh and clean notes with sweet warm vanilla notes. I personally find that this mixture clashes and does not work for me but there are a lot of people where this does work well.
Body Kouros is a very sweet fragrance which can easily get overpowering, especially in warm weather. My 16 year old daughter felt it was less masculine then many men's fragrances and I agree. I'm really not into overly sweet fragrances so this one is not one I would get.
I've not tried Lanvin so can't comment about it. The other two are definitely solid, good quality fragrances but there are a lot of people who don't like them. I would strongly recommend you try before you buy.

Answer:
Assuming that you mean Lanvin L'Homme, I would highly recommend it. Its the safest bet amung the scent you are interested in. It is an "easy scent" - not radically different from what you might be acustom to, but interesting and unique enough to be noticable. It also has amazing staying power compared to other scents in that class.
Geir is ok. I wear it in winter and enjoy it, but IMO it is too sweet for warm weather. Others disagree, so maybe its not such a great blind buy.
BK is weird. I don't like it personally, although it has good share of dedicated followers. I would say BK in NOT a safe blind buy by any stretch of the imagination.

Answer:
I don't think blind buys are a good idea. This has been discussed quite a bit but I'll just say this:
BK is awesome. Same perfumer that did Lolita, same vein.
No thanks on Geir.
- Rich