work like a dream
no sweat
tick over
run like a top
workable
make light work of
swimmingly
readily
unchallengingly
airtight
hitchlessness
comfortably
trouble-free
clean
skate
slip
soft snap
flawlessly
float like a butterfly
cleanly
manageably
thriftly
viable
wieldy
leave no stone unturned
efficient
well-oiled
smoothly
with one hand tied behind one's back
smooth
gentle
speedy
quick
docile
deft-handed
make little of
in a walk
failureless
unbungling
at a canter
exceptionlessly
God's algorithm
handily
wasteless
hands down
unproblematically
frowey
soft
effortlessly
unfutile
quick-handed
amacrine
seamlessly
unobstructedly
high speed, low drag
easily
mistakeless
painless
get along
one-handed
unmistakingly
pleasure cruise
nimbly
coast
unfumbling
eath
agilely
on the boil
well-run
sit there like a lemon
strainlessly
fault-free
conveniently
expedite
stand there like a lemon
nail
ungainfully
strainless
breeze through
break a butterfly upon the wheel
easiness
pass with flying colors
sail through
tunably
efficiently
facile
ace
like clockwork
sweep through
unflappable
tirelessly
unhaphazard
immaculate