Neon, Acrylic.... What's Next ?

This time I've got a question for you.
Did anyone of you use some acrylic nail tips ? I've have ordered some from Ebay last nite only because they look so fascinating, but I'm not sure about their quality. These metallic tips are just Must have - Try on my own.
I would be very grateful if someone who used this share expirience with me.
In order to impress, stay tuned !