I think the usual comments about Yakima Holdup 2 is its weight. But I think it's not a big problem especially if it does the work and holds the bike securely.
I've been looking for the same truck accessories. Choosing between the bike rack offered by Thule and Yakima. I should also take note of those hitch options.
You may want to check out this post:
http://www.toyota-4runner.org/engines-suspension-wheels-tires-audio-accessories/75601-front-bilstein-5100-install-tips-tricks-help-you-out.html