This kayak rack item is a well crafted, nice looking and relatively inexpensive answer to carrying your boats. You can put four kayaks on a small car securely with some effort. It's a bit harder to turn your kayak up on its side and strap in down to the Stacker than it is to slide it up on a cradle carrier, but if you need to carry more than two kayaks and cost is an issue, then this carrier fills the bill. It fits 95% of factory crossbars and works with Yak bars as well. The J style carriers from Thule and Yak work fine, but check out the cost. The Stackers fold down when not in use--helps a bit with gas mileage and looks better. My advice is to strap each kayak to the Stacker and then another strap around both kayaks and the Stacker. More straps means bomb-proof security at 70mph, not to mention the turbulence from big rigs on the interstate. This is a good looking kayak carrier that delivers. Easy on, easy off.

This is a good solid product. It is stable, easy to use and install, and reliable. The only downside is that attaching the straps around the kayaks when the stacker is attached to a mini-van roof rack can be a bit of a chore.

I've got my Stacker on a 2000 Jeep Grand Cherokee and I'm carrying (2) 10' kayaks on it. I love it. I can single handedly have my kayaks up on the carrier and tied down in less than 10 min. If it's windy, having another person to hang on to the the first kayak while loading the second is helpful. Another helpful tip is to have your straps in place; next up go the kayaks, toss the straps over the top and then tie them down...simple as that. And I'm looking VERY COOL when going down the road, too. : )-

The Stacker works great! We easily carry three kayaks (one tandem, two singles) atop our Honda Odyssey. Install the straps through the stacker first and lay them out toward the front and rear of the vehicle. After the kayaks are placed on top a simple flip of the strap and you are ready to secure!

This really is a great and simple solution to carrying more than one kayak and not having to buy a number of different holders. You can carry up to 4 kayaks with this thing depending on the size of the vehicle, Now that's some serious bang for the buck!
It lays down when not used so you don't look like the hundreds of people that have kayak cradles and never have a kayak in them.
One of the only downsides is it can be hard getting the strips through the top of the holders and around the kayak if you don't have a longer reach since the kayak is standing on its side.

The Thule stacker works great on our Saturn Redline Vue. At first we were worried we couldn't put any car rack on our Redline Vue due to the sports package roof. However with the Saturn Crossbars, the stacker works great.

I bought these so I can have the option of carrying 2 or more kayaks and still be able to pull the car into the garage without removing it. The "J" rack was too high. The Thule Stacker folds down. The Yakima stacker takes up less space on the bars, but if you have square bars, it doesn't fold down. So the Thule is working out well for me.

This product is a great option for carrying multiple kayaks and not having to purchase two single kayak carrier systems (at a much higher cost).

works very well. only put one kayak on but held it very well with no shimmy or shake. happy i bought it. feel confident that kayak is securely fastened.

works super well. I also had one kayak on top of my car. I say had because the kayak was stolen right out of the rack.... BUT this rack is still locked to my car so it's not going anywhere.

This rack is really easy to use and was quick to install with my existing Thule bars. I seriously think it took all of 10 minutes to pull the packaging apart and throw it on top. I love not needing assistance to get my gear on and off of my suv. When putting my Kayak on top and securing it to my SUV it would take about 15 min total. I also have 4 Thule systems and this has been firmly attached to my SUV since 2007 and has seen every weather condition possible. What is great about Thule is that their products are designed to not screw up your gear or your car. I am defiantly a loyal supporter of Thule.

I just got this rack and love it. It works really well for whitewater boats. I've even found that the space in the middle of the rack works well for carrying paddles.