Maxis Telesales called me today offering 500Mbps RM 89 & 1Gbps RM 119 lifetime price. Worth to transfer over from Unifi ?

It's pretty much the same, won't be much better or much worst than TM Unifi

Core network is the same, it will go to Maxis eventually

Only different is last mile access network

But Maxis Fibre on NGBB will have slightly lower latency (2-3ms) than Maxis fiber on TM Infra (HSBA) but difference is too small to be relevant to be frank

10 days, that's pretty good