I have used an Origo for the past 16 years. I love these stoves, simple, reliable, cheap to run. The stove tops don't appear to heat things any slower than your average marine propane stove. I have not used the oven much and so won't comment. There is a good thread on www.Cruisersforum.com
on Origo's. There is also a guy on that same board looking to buy a used pressure alcohol stove.
There are tricks to the Origo like any other stove. I bought one of those small liquid stove fuel bottles with a pour spout at a camping supply place and that greatly simplifies the filling process and makes it bullet proof reliable. Also some burners come with to small an furling indent in the screen. I carefully push the screen down so that the indent is about a 1/4" deep and the size of a quarter and that also simplifies fueling. I use hardware store alcohol which is cheap and does not soot which is not true of the high price stuff that Origo recommends.
For me this is a no brainer. In my life the only sailboats that I personally have known of that have blown up had diesel engines and propane stoves. I can never understand how there are people who refuse to have gasoline engines because of the danger but will calmly live with propane. I have spent too many sleepless night nervously tracking down for propane leaks.