Maybe you can ask
@tohchr -- if I'm not wrong -- he also uses SuperRoam 50GB (30D) plan.
I think the SuperRoam 50GB (30D) plan works OK for
@tohchr when he used in Malaysia.
My friend's experience last month (June) in Malaysia is opposite.
He used both SIMBA & a Malaysia Digi SIM card for a few days last month in Malaysia.
According to him, mobile data on SIMBA roaming -- surprising -- works better than the Malaysia Digi SIM card.
(BTW, Celcom & Digi telcos have merged and is effectively now the same company)
In fact, SIMBA works reasonable well such that -- my friend even turn on his phone hotspot while in Malaysia & share Internet access with others.
(My friend has now dumped his Malaysia Digi SIM card.)
Anyway, if you're willing to acquire & use a local telco (Celcom) SIM card in Malaysia -- then maybe you don't really need to subscribe to SIMBA SuperRoam 50GB (30D) -- unless you intend to use SIMBA roaming in multiple other countries besides Malaysia.