We've got a Wenlock in our study, had it for about 25-30 years. Amazing thing, compared to an open fire. Just needs the odd firebrick replacing every few years, and the cement around the joints, and re-stove blacking every year or so (a tiny job to do at the end of the summer). Hadn't realised the Aga Borg Monolith had taken them over as well as Rayburn, Stanley, et al.... No doubt they cost five times as much as they should now, have too many fancy features, thus break down a lot, and parts supply is non existent!
It's like that with our Stanley (which is pre-Aga vintage and parts supply is zero). Great old oil burner ~ Aga borg not interested in supplied loyal customers. Much prefer to supply guardian reading lefty wankers who have wet their pants after watching Huge Farty-Fartypants sell them a sanitized version of the good life.
As for the machine mart stoves, I like their simplicity, but they always feel a bit 'light' for me ~ don't forget that a stove like this needs to be really, really, heavy to be efficient, being a 'heat sink' that absorbs the heat from the fire before it disappears up the chimney. However, I have never actually used a machine mart one, so take that with a pinch of salt. Would be delighted if they were any good, they are cheap enough (some of the really small ones) and would be a good addition to our freezing workshop!
Let me know, anyone, how you get on with them.