I switched from Smartxne to 1010. I think at this moment. Smartxne is a little bit more stable than 1010 but definitely slower. My colleague is with Smartxne. His speed is half of mine. A few weeks ago the 4G network was getting worse with 1010. I think it has to do with 4G iphone upgrage. right now is fast and more stable. However, MTR coverage still bad. Cannot use 4G at all. The phone will switch back to H most of the time. You will need to consider if you are watching stream video on MTR all the time. Apple news and whatsapp are fine.
One thing I like with 1010 is the customer service. There is no additional charge when you need to switch Sim card. you can switch anytime, no question ask. Also the line is much shorter than other providers. The 20$/month extra over 1-2-3 is worth.