Just recently replaced my bathroom and chose a toilet from a brochure - a 'No-Code' Igloo.
What I didn't realise was that many modern toilets, mainly those designed abroad (the Igloo is Italian), have stupidly designed bowls on the inside.
Most UK toilets have a decent sized water trap, located to the rear of the bowl, with a vertical drop of the porcelain down into the water.
The Igloo has a very small water trap, located in the centre of the bowl, with a virtual 'shelf' all the way around it.. Without going into (unpleasant!) detail, it's almost impossible to use the loo without always having to clean it with a loo brush afterwards - and then doing a second flush.
Had I known the loo was designed in this way there is no way that I would have ordered it but neither my retailer, nor the importer, show any sympathy. "That's the way it's designed - and it complies with European standards" is their response!
Anyone thinking of replacing a toilet would be well advised not to choose from a brochure - but see the loo 'in the flesh' and examine the interior of the bowl prior to ordering!
DIY