They're not bad machines, I'm not a fan of the design and the plastics seem to be quite brittle from my experience. Spares are readily available but if it's got electrical problems that extend to the circuit boards or touchpads you might be in for a rough time.
The boiler pressure is controlled via SSR's and a pressure transducer or temperature sensor, not sure which, rather than a conventional pressurestat. The boiler pressure adjustment is on the circuit board under the drip tray, it's a tiny adjustable resistor.
Caught me out the first time as I just expected it to have a pressurestat.