Pellet smokers are nice, i used one and it was a fine piece of gear. It still left me cold though as a bbq lover.
It is like a gas bbq with a smoker function. They do look cool but thta is because they are not cheap.
The uk has minimal dealings with them so far also for example food grade cooking pellets are not in every shop and if it breaks chances are no uk engineers have ever touched one before.
Pellet smokers are for serious bbq'ers who go into competitions and such.
Use the minion method on coal for a long low and slow, 30-35 briquettes on grate and put 12 or so hot coals on top of them.
You can get a good 6-7 hours before adding more fuel that way.