['suction on one side is starting to go out', 'pumps 2-3 oz less than my spectra does per session', 'highest suction level is laughable', 'suction isnt the best', 'one side has a better suction then the other', 'The suction is weak', 'Suction is awful', 'Poor suction', 'suction is poor', 'suction isnt strong,  absorption_rate_&_longevity', 'Very poor suction', 'the suction device for one of the sides broke mid-pump', 'Poor suction', 'Suction is bad', 'suction is not good', 'suction is inconsistent', 'The suction was so low !', 'It just doesnt always work,  absorption_rate_&_longevity', 'Suction power depletes even with replacing membranes', 'The suction is so weak', 'suction is not good', 'very weak suction', 'suction stopped', 'hardly pumped anything', 'no longer provides enough suction', 'limited suction', 'I donâ€™t love the suction settings on this one', 'Suction is horrible', 'suction is barely adequate', 'suction quality was so weak', 'The suction is absolutely terrible', 'suction dramatically dropped', 'suction in one of the pumps is consistently weak', 'No suction power', 'Suction slows down', 'Not enough suction', 'stopped suctioning at all!, problem from the beginning that the tubbing didnt suction at first, after a minute or two it started working until it didnt,  absorption_rate_&_longevity', 'The suction sometimes doesnâ€™t work well', 'The suction is just okay', 'suction could be better, suction could be better', 'milk starts to suck through the tubing', 'suction is terrible, membranes are atrocious, electric', "suction isn't smooth", 'low suction pressure']
Users report issues with suction, mentioning weak or poor suction on one or both sides.
Some users express dissatisfaction with the highest suction level, finding it inadequate.
Complaints about inconsistent suction, with mentions of one side having better suction than the other.
Several users note a decline in suction power over time or instances of suction stopping mid-pump.
Overall, concerns about insufficient or unreliable suction impact the effectiveness of the pump.