it depends
i was on maxis also last time
as well as a few of my frens
can confirm maxis speed is fast
in my house area i can get 4mbps speed
now i use digi
average 1mbps
sometimes low speed somemore
bt

the cons of maxis
it seems very easily we can bypass the quota
no matter what the quota is
my exp is when i was overcharged
then it takes about a month for them to solve the issue
n not to my satisfaction
so i cancel it n move on to digi

my fren case
he used watchdog n lbe to check his data usage
n as always
witout fail
he will b charged extra for his data usage
when he go complain
they would simply reply
those apps is inaccurate
our data is accurate n it shows its over quota
this goes on for a few months
every month he need to pay 400 - 500

at last
he join me over at digi

our exp

for speed
maxis
for coverage
celcom
for cheap
digi