This bike carrier is well thought out. I found that the bikes are easy to load and the rubber straps seem to hold them securely. I expect that trying to add 4 bikes would be a little crowded, but I guess this gives you that option. Minor complaints are that the bike support pads themselves rotate a bit too easily, so you have to adjust them after putting the bike in place. Also, the bikes do move up and down quite a bit when driving down the road. Make sure the handlebars are not against your BMW's paint.

I love it but ONLY AFTER the following 3 problems were resolved. I can now drive with 2 bicycles mounted without wobbling, with the bicycle's front wheel in place and more importantly, I can remove the post and its arms in 10 seconds when is not needed.

The three issues and the solutions I have used...

1. When I don't carry bikes, the post and the carry arms obstruct the license plate. It is apparently illegal in my state to drive with the rack and no bikes around from what I hear. Obstructing the license plate is illegal. They also obstruct the backup camera as well. So, I replaced the single 3/8 bolt that connects the elbow to the post with the following 3/8 hitch, pin locked and handle. DOUBLE HH 103 The Original Hitch Pin, 3/8 x 4"
Cost - about $8.40. It is takes me now 15 seconds to remove the bike, pull out the pin from the replaced bolt and remove the post with its arms from the car.
BTW: The police may not give you a ticket, but they have a reason to stop and lecture you if you drive with an obstructed license place. You may ask, what happens why you carry the bikes? I don't know. However, I drive 90% of time without the bikes...

2. I have a class 1 hitch - so I used the 1 1/4" elbow. With the correct bolt provided, there is still some wobbling..
So, I used the following Hitch Tightener - as recommended by others. I used the provided bolts face up - otherwise they stick down too much in my sedan.
Hitch Tightener for 1.25" and 2" Hitches - Heavy-Duty, Easy-Install, No-Rust - Made in the USA
Cost about $20

3. There is a need to stabilize the front wheel from turning. I use heavy duty bangee cords with Carabiner Hooks. Unfortunately, I found those in a set and they are very expensive. Heavy Duty 3/8 Bungee Cord Assortment Set with Steel Zinc Coated Machine Carabiner Hooks Proudly Made in the USA By Super Smithee.. Cost about $48!

I should have tried the single 24" long similar product for $8. Keeper 06152 24" Super Duty Bungee Cord with Carabiner Hook

I find those three items necessary for everyone who is using this Hitch Mounted Bike Carrier... I am surprised the company does not provide all three items above with the product....

I am now very happy with this Bike Carrier.

Very well engineered the bad is: the bands that secure the bikes in the cracles started breaking after my second use of the rack. The cradels also are showing extreme wear the ridges are almost worn smooth. I would hope that the company would stand behind their product and replace these defective parts. I have contacted customer service awaiting a response.
WOW! Shortly I mean shortly after contacting customer service and Allen Co. and providing proof of purchase and explanation, they stood by their product and are replacing the bands. I am very appreciative of their service and understanding.

I've used this product for the past year - up until today I was mostly satisfied with it.

Notes:
- It doesn't fit my hitch well, so the bike/hitch bounces around
- While driving down the highway, one of the straps broke, dumping my bike in the middle of a busy highway (70mph traffic). Thankfully, every car was able to swerve into the medians and highway shoulder, so one one was hurt or no damage was done to anything besides my bike (expecting about $300 in damages).

Looking back, I regret purchasing this rack.

It's probably an okay rack if it's not heavily used and secondary straps are used to secure the bike. For me however, this rack was dangerous and almost caused a lot of harm.

This is actually the second Allen 3 bike tow hitch carrier I have had, I left the first one at an RV park by accident. The first one was the cheaper version of this one, I had it for several years and it worked like a champ. Some of these bike racks are stupid expensive, so I figured I would upgrade to the nicer version of my old one because of the rubber stretch straps instead of the nylon ones that were on my cheaper version. Even with the upgrade the Allen one is much cheaper than most. Just like the first one I love it, this one has easier folding mechanisms than the hand pin ones in the other and the holding cups are nicer as well.

A lot of people complain about how bad it wobbles, but that is the nature of pretty much all tow hitch bike racks. It is pretty easy to fix you can do it in one of two ways or both, which I would recommend. First I'm guessing most people who use a tow hitch bike carrier have a truck like myself. The pin hole in all the trucks I have owned is 5/8" and not 1/2", so the hole for the bike carrier is smaller than the one in your truck tow hitch, thus creating the bad wobble. Don't even mess with the anti-wobble pin it will not work as it again is the wrong size for most. Simply go get a 5/8" drill bit specifically for drilling through metal $15-$20 at Home Depot. Drill the largest hole on the bike carrier to this size. While you are at Home Depot you can also get a 5/8" locking pin (again I would recommend so someone doesn't steal your bike and rack). This will take out a lot of the wobble. If you are still not satisfied purchase a Hitch Tightener there are a couple good ones here on Amazon, and they are less than $20. For short trips I just use my simple fix above for long trips I use the Hitch Tightener. Problem solved :-)