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For what it's worth, this is what I'm typing on at work right now, bought with all of the frills at the time (8 GB ram, 2nd fastest processor, etc.) for over 2 grand over a year ago in September at the Labor Day sale. I'll do personal rather than look up links on this.
I've owned 3 Lenovo ThinkPads now, 2 of them tablets. Durable as anything. Rarely needed warranty service (hard drive on old X41 tablet). 1 USB port on this a bit erratic. Don't have bluetooth on due to security. Touchscreen w/Windows 7 works decent, digitizer pen works better, definitely improvement over XP on the X41. Screen on full brightness will take battery life on the 52+ lithium extended down to about 3-5 hours depending on how good it is.
Wireless is reasonable, pretty good i7 for what I do. Glad I have it. Screen is sharp enough for business. Keyboard is wonderful, but that's nothing new. I've dropped it a few times accidentally, held up well. Is a bit heavy if you buy the extended battery, but not impossible. If you buy the dock, it can be a bit inconsistent undocking it. Sound is reasonable. Have to go back to work. As noted above, I'm not sure how good the price is vs. a X230, but I have no significant regrets on this convertible tablet. Hope this helps, maybe I can come back later.
Oh, and I HATE the touchpad. That cute red little button is what I use, with the buttons, more than the mouse, and I turned the touchpad off as best as I could. If you press too hard with your wrists/initial part of hands while typing near the touchpad, it sometimes throws the typing off