As a daytona addict I have to awnser. See my homepage for pictures.
Are we talking daytona or daytona rs?
Basicaly they are easy to do all the maintenance yourself. Just take one for a drive, thats the best way to find out if you like it. I did 10 years ago and got a new one.
Weak spots some have:
The cilinder heads sometimes crack, somewhere between the valves.
The valve guides wear quick, Guzzi didn't use the best material. Can be solved.
The daytona and first series daytona rs have staight cut gearboxes, good for power, but not as long living. The daytona has no rear cushion damper in the wheel, not good for the gearbox.
The RS has basicaly the same engine, but with tuning parts added, carrilo conods, forged pistons and hotter cam.
When the complete stock exhaust is on it, you won't have much midange power, that changes dramaticaly with a good exhaust system. ( I do have one for sale:-)
I do like the looks from the fist daytona more than the RS version, but that's personal.
A Daytona is a dream for a lot of guzzisti.