Got a Merryfair Spinelli for about a week now, so far so good.
Love the mesh backrest and headrest.

Can see from here http://www.merryfair.com/product/spinelly-2019/ and download the brochure as well.
I bought from Shopee because there was 20% off for one of the colorway.

Wah your company so nice wan

Interesting ... I tried the Pofit at the showroom (granted it was only for 15 mins) and really liked it.
Didn't buy it because no stock.

There is a Wau 2 model which is the same, but with a wider backrest.

So ... in addition to the Merryfair Spinelly (posted about this earlier), I also just added a Merryfair Wau 2 for my wife.
Here are my thoughts on the chairs you are looking at.

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1. Steelcase Leap V2
This is much more comfortable and build quality is much better than the Merryfairs. However, just like @miyakochan89 pointed out, the promo package for the Leap V2 (RM2.5k) is only with the cushion back rest, but I prefer a mesh one. There is no promo package for the mesh backrest, so you will have to pay full price ( > RM4k). More importantly, the sales people at ZenPro are damn f**king LCLY, and put me off buying anything from them.

Note: I also tested the Steelcase Think which is (no promo) about RM2.2k for one ... comfort is quite decent but the headrest cannot pakai one. However, they did tell me that the headrest will be upgraded for 2021 models.


2. Merryfair Wau
As mentioned above, I bought this already. A lot of adjustability with very good lumbar support, but build quality is very "plasticky" ... does not feel high end at all. My pregnant wife is very happy with it though. The good thing about buying from Merryfair is you can customize everything, including colour and material.


3. AM Office POFIT
I actually found this really comfortable ... first impressions were excellent. But build quality is also very "plasticky", similar to my feedback on the Merryfair above.

Note: I also tested the Ergohuman which was nicely built (compared to the POFIT), but somehow I just couldn't find the right fit for me (I think this is more to do with my own body than a fault of the chair).


4. ErgoChair 2
No comments - did not test

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Overall, I am happy with my Merryfair Spinnelly and Wau, which with the promo price, both added up still cost less than one Steelcase Leap (even with their promo). Like I said, the Steelcase is a better chair, but there are some compromises you have to make unless you don't mind paying full price. More importantly, customer service at Merryfair is top notch compared to those at ZenPro.

Sekian, terima kasih.

I think Merryfair delivery depends on where you are located. I'm in Klang Valley so they used their own delivery service, and it came fully assembled. Just need to cabut the plastic wrapping.

Yup, I also ended up moving my chat with the Merryfair CS from Shopee Chat to WhatsApp, during which they also gave me a good deal, and resulted in me buying my 2nd chair from them (the Wau 2).