Yea the boomerang is nice for cruising and lazy shifting. If I feel like I need some more spirited driving, I will flip it up and it is completely out of the way and it feels like OEM with you supporting your arm weight and such. Some people say it needs to be an inch lower, which would still feel nice, however that limits how usable the cup holders and cubby holes are more.
I frequently drive with a nice tall travel mug in my front cupholder spot and it not an issue. However, the pull-out cupholder integrated into the boomerang, is not very useable for cups while driving. That does get in the way of shifting.
Overall, the added comfort it can add to a long drive makes it well worth the investment in my book. And it would be very easy to remove if you wanted to.
I wonder how the OEM one compares as far as height, and shifting and space it takes up.