Bob,
I own older i5 Thinkpad too(my work computer).
Thinkpad Yoga line is built same way, actually I believe a little bit better, even more solid. Because it is meant to be carried around. Same kind of metal/carbon chasis, etc., but very slim and light.
Nice things, you can get them cheap used, because many large companies are buying them for employees and then flipping them. And most likely they would still be under warranty, which by the way is also up to the standard.

...Crazy sale came up couple of weeks ago and I was able to purchase additional 3 years Thinkpad warranty for $1 (Yes, one dollar for 3 years).