Found a couple threads mentioning this, but wanted to know a little more from people that have used this. Does it really make the veins "pop" out when you roll it down or is it pretty much the same as with a normal tourniquet? Is it a big difference between the BOA and normal IV tourniquet? Does the BOA work better on a certain group of people(like elderly)? Can it be used with PTs that have very small arms or very large arms? Is it worth the $9.and change? Pro's and con's? Sorry if this was covered in another topic that I may have missed. Thinking about getting one from the training video I saw, but just wanted someone who has used it or seen it used to give their experience with it. Thanks.