just to be clear,i look after 2 septate housing associations/property management agencies,this adds up to 120 properties they have a mixture of worcesters and glow worm cxi boilers and vailents . i am not impressed with any of these.to be fair i cant comment on a visseman as i have never seen one there are several reasons why i specify the potterton performa no big part being to the 130+ i have fitted over 7 years being super reliable,but like all boilers they do have problems the biggest single one being the recuperater bursting and chucking water into the condesate trap but this has happened 5 times,they cost me 47 pound inc vat and take 3/4 of an hour to change because one thing baxi cant be criticised for is they design with maintenance in mind,this customer is addament on a worcester because it has a blue light!!!!!, personally pretty aint reliable, like a lot of you guys i base my choice of macine on what works and the performa being a baxi 105 is well time proven,the only one i would not fit again is anything with a instant badge on it because these really are utter crap,but i am tempted to look at a weissman over a worcester as this guy does not want a performa because of his nightmare of a barcelona and sadly muck sticks,which is a shame,performa parts are cheap,and they are reliable