Twenty five years and I never went to work without it. Takes all the guesswork out of even the most difficult sticks: geriatric, pediatric, bariatric, and fragile. Sets an I.V. without the worry of infiltration, gets the draw on the first go. Stop dreading phlebotomy and get this. Tax deductible. This one works perfectly, comes with the batteries and all the blessings I can give you for a joyful career. You deserve it.