Well, I have heard about this company from a friend of mine who got a horrendous benefit from using the TTL loupes in his clinical practise but I honestly didn't believe that until I ordered my own set along with their new light which can stands for almost 12 hours before recharge it again. Time wise, it took them only two weeks from taking the precise measurements for interpupillary distance and working distance, which has been accurately done by their staff. Money wise, it really does WORTH that amount of money and thanks for the 20% discount as they offered that for students and remember you are purchasing a life-time product so it deserves to be generous with. STRONGLY RECOMMENDED !!