I have had mine since I broke my Transformer Prime screen, almost a year. I still love the Asus tablets. They may be a little quirky, but they are awesome in customer service, and really try to help their customer. However, if it is out of warranty, just buy a used one, it's cheaper.
As to quirky... Random shutdowns and lock ups, but most are caused by apps and/or not cold booting. Stock browser and keyboard should be replaced because they are not user friendly. Randomly won't charge (happened twice - unplug from wall and cold boot to fix), wifi not working - you put off the os update too long now it is time to install. Etc... My Prime had these quirks as well, but then so did my Galaxy and Evo phones.
Good stuff... Awesome Screen. I can read with sunglasses (oakley black iridium lenses)on in the sun while it is in landscape mode. Not much of a movie watcher, but have done video classes on both the tf700 and tf201 with no lag or desyncing of sound, and uploaded video of my daughters drill team and choir performances with no issue. Able to edit high res photos, use apps to work off my work pc and laptop, use oovoo to talk to my daughter, etc... All around great tablet for me, and this is a good price for the tab and keyboard.
I do not have the keyboard, but I have an Asus laptop for that part of my job, so I can not comment on that. Except to say that most of the reviews are awesome, and I love the keyboard on the laptop.