i've installed 5 er9 and 4 sensah 2x11 mech. for me, LTWOO > Sensah, any day of the week. The FD from Sensah is useless, i've had a Sensah RD die on me for no reason and Sensah told me to go F myself. Meanwhile, at least until now, my experience with ltwoo has been flawless. I'll the 1st to start shitting on them if that changes, though.
People here keep saying erx has had problems. Afaik, the sleep issue was because of batteries with tabs instead of springs, that's fixed now, and SOME have complained about water ingress in the cable port of the RD, which you can seal with grease of liquid electric tape. Tracevelo literally submerged his egr and had no issues. I'm not aware of other issues?
And the er9/erx literally has more functionality in the app than shimano; i dont get the hate.

Where do you buy your ltwoo parts? Find them very unresponsive on Ali.
They don't even answer basic questions :s

Play came back in the headset, really noticeable when pushing the brake and wiggling the bike front to back. Anyone has an idea what could cause it? :s

--> Do not overtighten the expander in the fork. It pushes the top part up. (That was the issue)
I always tighten those very hard but here the expander didn't really like it. Fixed.
Quoted myself in case someone runs in this issue.

Besides that this frame rides like a dream.

Headset play fixed btw, thx guys!

Finished my build to, got a little play in the headset that i'm unsure about managed to get most out of it. I'll testride it tomorrow.
Budget build with Sram apex and Elite Wheels.

Anyone has a picture of what u shape exactly on the expander?

I really have to contemplate and defer from going on AliEx website for the meantime because I just ordered a $700+ 105 di2 upgrade kit.... That's already beyond my budget means and I don't know why I still ordered one lol

Lol I'm just like you ordering and than thinking why did I order that, did I really need it haha

I've ordered 3 of these with the 11.11 action. I'll report later with additional feedback. 2 for my road bikes and 1 for my gravel bike.

Damn this is one good looking frame!

Received the wheels earlier this week, tested them. Damn I love these wheels at this pricepoint.