OK Guys I just received my ANGGUN egornomic chair from Merryfair.
I added RM50/- for optional base of diecast alluminium alloy material.
1. The chair looks nice and solid.
2. The adjustable lumbar looks and feels good. So far, no issue.
3. The adjustable hand rest for the updown movement looks cheapo. This is because I have used a better adjustable arm rest chairs in office. But, this is not an issue to me, because I seldom play with this arm rest setting once set up.
4. Overall it is worth my money.
No regrets. I think it is a reliable chair, we shall see.
5. Aftersales support and communication is great.
Once order confirmed, they will communicate with you on whatsapp.
Very fast and responsible response.

I am 165cm, and I bought the high-back version.
Total damage: RM628/= (Inclusive delivery - from KL - Ktn )

Being in East Malaysia here is super duper hard to get good & affordable chairs here

We have very very limited choice here, and the better ones are super expensive as well

Buy online?  either the seller will claim "Free Shipping for whole Malaysia, except Sabah/Sarawak"   or the shipping fees will cost us an arm and a leg

Finally found an offer on Lazada just now for the Sihoo M57 @ RM799, with Free shipping, and it's the official local store somemore, bite the bullet and hope they won't cancel my order *finger crossed

Do you own a M57? Mind sharing your height and your review about the chair?

I believe I found the same seller as you did, on both Shopee and Lazada. They have a branch in Sri Damansara, and they offer up to 3 years warranty and provide free shipping (except east Malaysia, +150 they said 😅). Looks promising as I'm hoping to secure more discounts on coming 12.12, and it's more convenient to deal with local seller.