Good value for money if you're specific and patient.

I went to Jenny last month to get a linen suit made. Being 188cm tall with a thicc ass and thighs makes it impossible to find any clothing that fits off the rack other than gym clothes here, specifically pants of any kind , along with shirts that have long enough sleeves.

Since this is a casual suit I'll be wearing at parties over the summer I didn't want to spend too much on a suit that is going to be taking a beating. The total cost quoted was less than 2k, including an off-white linen shirt to complete the outfit. I was pretty exacting on the details and fit I wanted, and maybe my long list of requirements got too long because eventually a couple things got lost in the mix, namely the type of soft shoulder I wanted. If you can bring an example of what you want, it makes this part much easier.
In the end she was very patient with my grumpiness after the first awkward fitting, and after 2 more rounds of alterations we reached a point where I was happy with the suit – it's held up well over the past few weeks of wear in the humidity and heat.

From my limited experience looking around at other tailor shops, the quality of construction is better than other tailors in the same price range (Under 2k for the suit + a linen shirt that I'm also quite happy with for the price). I'd say it was almost on par with my experience having wool pants done (with my own fabrics) at Carol and Luc tailoring in Jianguomen, which was a step up, price-wise (I think around 400+ RMB in labor cost, per pair)
I've also been to Feifei for alterations/repairs and a tuxedo and always been pretty pleased with her price/quality ratio, but her selection of linen was too limited when I asked.

At Jenny's I went with the cheapest chinese linen on offer, nothing special but perfectly serviceable. There was another jacket being made out of a nice and nubby teal italian linen that was visibly nicer but also about 2.5x the price. As another user already commented, the fabric selection at most tailors in Beijing is either sketchy, limited, or overpriced (and even then who knows what's real or not, I've seen plenty of fabric books with egregious typos and misspellings, despite the nice fabrics inside...) so if you're picky about the fabric best if you can source it on your own from a reliable vendor overseas, along with other materials like fancy buttons, even zippers... then just rely on your tailor to cut and sew it all together for you.
The quality of the small details like pocket fabric / liner / fasteners, etc on this entry level priced suit from Jenny's was a pleasant surprise.

For the price I'm very pleased with the results and will probably go back for an extra pair of trousers and some more linen shirts before the summer's over.