Having read through hundreds of reviews claiming this is the only lash glue you should buy, I found it on amazon at a much cheaper price than the MAC counters in House of Fraser, for anyone wondering as this confused me, it isn't made by MAC and as far as my research got me it is cruelty free, which is great as I only buy cruelty free make up.
I bought the dark glue which goes on a dark grey and finishes to a not quite jet black, however an age old tip is to apply liquid eyeliner on your lash line to give the glue a better surface to adhere to and this has always served me well. This glue kept my ardell wispies on allll night and I was dancing and sweating, being rather drunk I didn't take off any of my make up (bad I know!) and.. My lashes were perfectly intact, a few were a little bent where I had smushed them with my face and pillow but still perfectly glued on, so definitely survived the longevity test. After getting over the initial shock of them lasting this long, I was then worried over how difficult it would be to take them off.. However a very gentle pull and they were off, didn't even make my eyes water!! I am very pleased and I am definitely a Duo glue convert!!
Arrived very quickly and well packaged!