IF:
1. call about 400mins & 200 sms per month, go for talkmore48.
2. call about 200mins only & 100 sms per month, go for talkmore28.
3. call about 600mins & 500 sms per month, go higher at talkmore78.
it is a good plan, if, ur usage is between the free allocated offer

there is no catch.
for data plan, once u reach the quota, maxis will charge u at 30sen/mb.
so u need to install apps that can monitor ur data usage and alert/disable data after reach the quota.
its good if u have wifi at home/office so the data will be use only on-the-go.
me and my wife both using talkmore48. but we under biz plan. no extra charge after reach quota. but biz plan is another thing, here we talk about personal plan

Added on October 14, 2012, 2:00 amoh just noticed htc one s bundle package is currently only for talkmore48

My range falls into the talkmore48 plan. I think the data plan should be ok , since i dont plan to use that much.
Was actually planning to get HTC one s with the talkmore 48. Was wondering if there is any problem/catch if u get phone bundled with plans from maxis . Will there be any warranty issues ?