i am 5' tall and loading my kayak on my SUP Taxi worked well and it was very secure, but when my car was scratched loading my boat, I knew it wasn't going to be an OK solution for me. The Slipstream is a very creative solution to getting the kayak on the car without coming in contact with the car. I have no problem loading and unloading the kayak by myself (with a ladder) - my kayak is 44 pounds and 15'. Getting everything configured was time consuming, but once set it's good for my boat without any continued adjustments. I didn't give the Slipstream 5 stars because Thule set very high expectations with the SUP Taxi design and I am disappointed with the crossbar attachment on the Slipstream.. bolts and wingnuts .. yesh.. so much work. I have no idea why the very efficient attachment straps on the SUP Taxi weren't used on the Slipstream. The other disappoint is no ability to lock the rack on the car.. WHY NOT?? This rack has a hefty price tag, I would like to have a sense that when I return from a paddle the rack will still be on the car.