This Sanyo SC-780 is not one of my better purchases! Lack of suction has always been a problem, the bagless filter is next to useless unless washed after every few vacuumings to remove clogging dust and the sealing of the filter and the dust collection box/ body of the vacuum cleaner proved to be less than perfect.
It being long out of warranty, today I stripped the motor down to try and find any faults as the suction has gotten even worse than usual and the motor overheats after 2 or 3 mins use. Found the motor compartment and the motor clogged by dust, hair and debris (back to the ineffective sealing) and the rotor itself badly damaged, covered in deep gouges over nearly a 1/4 of its area, possibly a quality control issue at manufacture as I cant see any corresponding damage to the stator and the bearings are sound. Its going in the bin!

Not a good buy - 2 years & 5 months use & it has burnt out, just past the warranty period - are they designed to do that ?
Compare this to our cheap Hitachi that lasted 15 years & had excellent suction ! So good that Hitachi stopped making it - obviously lasted too long.
Personally I wouldn't recommend buying this product.

Overall the Sanyo SC-780 vacuum cleaner is absolutely CRUD,because it's bagless the filter gets clogged up quickly and is very hard to clean without water. After using it a few times the suction is extremly poor. the head doesn't go to the edges of the skirting board and doesn't pick up the little crumbs; it also glides on the carpet and lino so much that it misses the dirt. the tubes are so slender things get stucked easily, the plastic ( around the handle that attaches to the meltal tube)is very weak and broke in less than a year! deffinatly a waste of £70. if you do buy it you'll be cursing none stop. oh yeah! 2year and a few months it's broken now, just conked out! now I'm looking for a new hoover!