Hi Shelley
Looks like you may be on the same creative course as me in June - I currently use Bio Sculpture on all my clients - it's a soak off gel and really really good for the nails - you wouldn't believe how much my client's (and my own for that matter) nails grow with the Bio Sculpture on!! Although I must agree with a lot of other people who have said that it's probably better for natural nail overlays rather than extensions as I do have a few problems with the clients who I do sculptures or tips on. And so many clients are amazed to see the state of the nail underneath when the gel comes off - it's always much healthier and stronger than any other product they've had on! Even though it's more expensive than a lot of other gels (so obviously not as much profit) it still goes quite a long way - I don't like to overcharge so I'm still only charging £20 for a set of overlays and find it's still a good profit margin.
Anyway, that's my opinion but I decided as some people seem to be heavy on their hands I need to do a different acrylic to Star Nails (which I originally trained with) - found their acrylic was nowhere near as good as Creative (tried out a sample kit of that one for a while) so have booked on the course - hoping to eventually do my NVQ with them.
Hope this helps
Good luck
Michelle x