There's a thread for that
https://forum.lowyat.net/topic/4766860

Merchant trade
Pros
1. Free withdrawal at merchantmoney
2. RM1 withdrawal at ATM
3. Wechat treats it as Debit Card. So you can get free transfer to Banks via Wechat
4. On and Off promotions. On 11-11 last year, I spend Rm500 at taobao and got Rm100 back. This was on top of all the promotions in the taobao website. A similar promotion happened on 12-12 as well. In total I got almost RM200 cashback for Rm1000ish spending
5. There were some groceries shopping promo, and hotel/travel booking promos giving 10-20%
6. You can get the MCC code instantly
7. You can buy Forex (i do not have this feature activated)

Cons
1. They charge Rm10 or something as issuing fee, and there's an annual fee of RM8 that is waived the first year.
2. No CC reload
3. Took 1 month to process Taobao refund via Revpay, and they manage to screw it up twice by refunding someone else's transaction. I guess their process is less automated. This was in January.
There are a bunch of features that I do not have the chance of trying, such as eRemit, eForex, etc.