Anyone rented a portable ultrasound machine?!

Sa

So as the title says I'm just wondering if anyone had used one of these? I was thinking of renting one in a couple weeks to find out babys gender myself, even if I dont it's still worth the 3 day rental getting to see baby whenever I want and for the same price as 1 private ultrasound!

Was hoping for some reviews before I go ahead and order one though so if anyone has rented one before how was it?