Bests & Worsts Reviews from Amazon

I am the grandpa of an almost 6 year old girl and 3 year old boy. As an engineer, I made detailed spreadsheet comparisons of Dripex, Branton and Jugader with a similar $200 price (shipping included) at Amazon and purchased this Dripex primarily due to superior identical 2" wide x 50-foot long Ninja and Slacklines. One vendor offered a single 100-foot line with one tensioner that had to be wrapped around one tree to provide dual Ninja lines between trees and no possibility of a slack line. Another had a 1-3/8" wide line for Ninja attachments and 2" wide for slackline. Price for Dripex ended up $15 less than the other two and included free shipping by Dripex. I do not understand how one can use side by side lines when wrapping a 100 foot line around trees approx 45 feet apart. Would have to have two fairly large and similar tree trunks at the right distance apart to obtain the desired separation between the two lines. Attachments seemed similar for the vendors in my review but Ninja and slackline and Tensioners were the most important to me. One concern was prompt shipping and customer service because Dripex was not fulfilled by Amazon. I emailed Dripex twice and responses to both received the following day were well answered and so I purchased. Also shipped me some extra buckles. Shipped the day after ordered on July 15 and received July 23 via FedEx as promised. Excellent communication when shipped and delivered. Two identical lines with separate and identical tensioner straps about 4-feet long were received so the full lenth of the lines was available for 17 Ninja connections. The tensioners are relatively easy to install. Installing the brackets in the right position takes time but will remain in place as impossible for brackets to slide without undoing the top tensioner. Granddaughter doing backward flips on the swing and bounces off the slack line on every pass of the swing. Positioned net and rope ladder next to the short attachments to provide easy access to all. At 3, our grandson loves but doesn't appreciate all the bouncing caused by his big sister. Suspect he will join in soon as he loves to be with his sister. Neighbor about 160 pounds walked the length of the slackline without any question that even a 250 pound person could use. Two of the photos in my review show 3 knots in each rope to shorten because of the slackline. When I asked for support, they explained how to adjust the length of the ropes so the knots will be eliminated. As provided, you could install as two separate Ninja courses without a slackline. Have plenty of room for more Ninja devices at either end. Highly recommend the Dripex Ninja course.