M1's network for the WiFi was always stable. In a 5RM Resale with the ONT & Asus Router being in the living room, all rooms can still experience full signal strength and great internet speeds with stable connections. Never had I experience any connection issues/slow speed/downtime with M1, even during public outages, I had never once been affected by them.
M1's CS is prompt in addressing all enquiries and issues. They are fast in phone calls, unlike some companies where one may need to hang on the line for some time before an agent can attend to you. They are prompt in Email replies as well. Service from the CS team was the best with everyone being friendly and patient to address everything, even received follow-up calls to check on the status.
They offer Sunpoints for bill payments in exchange for gifts from their store. They also offer attractive rewards for re-contracts and various promotions from time to time. The current product (1GBPS Broadband + Phone Line + Data SIM) was the best at the time I wanted to sign up, was also the cheapest. M1 is definitely a brand that offers affordable plans.
I have no doubt about M1's service however I am highly against the Asus router they provide with their broadband plans. Being with M1 for 4 years, I had switched up their previously issued Asus Router (RT-AC1200) to the newer (RT-AC2600). Both of which had given me numerous problems throughout these 4 years. There were 3 occasions where the router would have an auto firmware update that would get corrupted, 2 of which required me to personally bring down to their service centre in Kallang when I stayed in the west during office hours on working days. Another 3 separate issues were hardware & connection issues where M1 could only provide minimal support and would need me to contact Asus but Asus's support was nowhere helpful in promptly resolving the issue and would often play badminton and push it back to the ISP (M1). As a customer paying for the service, I would minimally expect some form of reliability in the product provided and on-site support in the event there are some issues with it, not for me to apply leave and go down to the service centre to send the product in and apply another leave to go down for collection. I had bought 2 Asus routers of the same models when the existing ones gave me issues and even the other 2 too had issues over time. This just brings about how despite being untouched and left alone, it's bound to have its own set of hardware and other issues. This however could only be due to the routers being entry-level models but I still feel it's something one should prepare for when singing with M1 unless you are getting your own router. Would only recommend it to others that are getting this broadband plan with their own routers.