Reviews for his show (and this was Bing ffs!)
Stewart Lee review – underpowered show still stronger than most | Comedy | The Guardian
Stewart Lee: Basic Lee review: the leftfield comedy legend returns (timeout.com)
All reviews for the same show on his website
Basic Lee : Stewart Lee - 41st Best Standup Ever!
With the prices of tickets and so much to choose from in Edinburgh, I don't understand anyone buying expensive tickets without finding out about the current show. You can always take a punt on Free Fringe acts because they're free/pay what you can or buy a ticket for Pleasance's Fast Fringe (12 acts do 5 minutes each) so you can work out who you like. But otherwise you risk losing out ££.
Seeing Stewart Lee for the first time - and an afternoon gig at that - without knowing what he does, is going to be bloody hard-going, especially if it's deconstructing jokes/elements of stand up.
The first time I saw him live, I hated it, hated the repetition, hated him. Other half was pissing himself at how far he pushed it. And probably laughed at my utter confusion/vitriol over an hour I wouldn't get back.
Had I been on social media Stewart Lee probably would have put my venting on his website. See below.
Online Critiques : Stewart Lee - 41st Best Standup Ever!
He is polarising. He is also doing a well-worn schtick: the bitter, twisted curmudgeon. Now - as with his erstwhile partner Herring - if you need to be told it's just a persona not the real him and he's convincing you too much, maybe he's closer to his persona than he'd like to admit 
Similarly, if you need someone else to explain your joke/why you are funny, then maybe it's not that funny.
His act is gutsy though. The tensions in the room have put me on edge in the past (yes, I saw him many times after that first time as my partner and I used to pick shows each).
On BBC iplayer you can see Tornado/Snowflake. I watched them both and laughed often but also went "No, you can stop it now!" to my partner's amusement. I get what Stewart Lee does but sometimes want to kick him. Which could well still be the reaction he's going for.
He described his hero Ted Chippington as "a mixture of surrealism and insolent provocation and uncompromising boredom." To a large extent, he's adopted that approach including contempt (or pretend contempt) for jokes/observational comedy/anything which constitutes selling-out/pandering or is popular (at least this is part of the persona) and takes it as far as he can go.
This makes him an acquired taste/comedian's comedian/cult comedian change the consonant I do laugh out loud at the "See, I can do jokes, I just choose not to" -it's funny cos it's true- I also find some of it tedious/wearisome at times.
But his short run at the Fringe is sold out and I doubt he has any fucks to give about being slated on here. Just more quotes for the website. I'm sure he speaks very highly of us (he doesn't).
Shame about him and Bridget Christie though. I liked The Change on Channel 4, liked her stand up and her book, liked her on Taskmaster. Admire and respect her for telling tabloids she wasn't going to talk about Stew and never has.
As for him being in his fifties with someone in her thirties, meh, tale as old as time. He had said people would think Omid Djalili in The Change was him. Whether that means she left him irl or that he didn't do chores or that he just predicted human tattle, don't know, but if they separated two years ago both have the right to privacy/right to move on/right to protect their kids.