Riley Super Skyrocket !

[mikezen]

Hi,
I'm Michel Heintz, french new member of this forum (living in France).
For a long time ago, I have ever been very fond of Skymasters and, in particular, of Riley Super Skyrocket conversion.
Now, I'm about to purchase such a plane (purchase agreement signed, prebuy inspection in progress), though some people advise not to do so !
Are there any Super Skyrocket owners on this forum ?
If yes, is it really a bad idea ? Are they effectively money-pits, when they are flown enough frequently and well maintained ?
What about their reliabiliy ? Is it really so bad ?
Does rear engine always overheat or is it a matter of engine management ?
I know their fuel consumption is higher and payload lower than normal Skymasters, but in french we say "when you love, you don't count !"
One last question : the plane I look at isn't equipped with de-icing boots, is it possible to add them, though the presence of required Horton STOL kit (STC SA937CE) ?
Thanks for your answers !