Not in my experience. Well built. Every boiler tested so it works out of the box. New models are easy to install and service. Backed with up with Worcester's first class support and service.
you must be talking of a different boiler to the ones iv fitted recently. 2 had oil pumps leaking like a sieve straight out of the box . boiler case is flimsy and you still have to dismantle the panels etc to make the oil connection. not as bad as the greenstar heatslave 1 but still a pain to fit. [/code]
You do not need to dismantle the panels to make the oil connection on the new ones. Unlike the others the oil pipe is run inside the boiler and there is a bracket to hold the valve in place.
Regards leaking oil pumps that's not Worcester's fault but Reillo's and a problem that affects all UK oil boilers as they have Reillo burners on them.