I got a yoga 700 recently when a bunch of offers stacked up. UK pricing generally is horrible compared to the US (1:1 usually), so this was an £850 i7-6500u, 14" touchscreen, 8GB ram, 256GB SSD. Paid £550 after rebates etc. I think the 700 is a slightly slimmer version of the 500 (900 is the top end with the watch hinges). It's ok, and although 'tablet' mode is never going to be something you carry and use as a tablet, it's fine for resting on your lap.
Display is quite 'sticky' though - your finger doesn't move smoothly over it like on my phone or iPad. And no pen support - I tried looking for one but Lenovos range in the UK is really limited. I'll survive without until next year and then either get a SP5, iPad Air 3 (wih pencil support), or a SP clone from dell/Lenovo/HP.