Maybe we were just lucky, but our Vivotab RT has been great. Responsive, reliable and really nice to use.
Though not as high a resolution as my iPad (issued by my employer, not something I enjoy using personally), the display is very sharp and bright. I prefer the aspect ratio of the Asus to the squarish shape of the iPad. The iPad's heavier weight and sharp metal edge make it much more uncomfortable to hold.
Being able to have multiple accounts on a single RT tablet is really handy. iOS can't do it, and Android doesn't do it well.
And surprisingly, the Tegra3 has done well under RT. I had one in an android tablet a couple of years ago, and it was a dog - apparently not the CPU's fault. We aren't gamers, but for all the apps we use, performance is fine.
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