It really depends on what you are looking for as to what features on the Spyder are pros/cons. Make a list of what you really want and ask specific questions. Search other posts in the forum, there is lots of information here for the reading.
Most importantly IMHO, take one for a test ride. But during the test ride, remember that the Spyder is a cross between a ATV and a motorcycle. Steering more like a ATV, open like a motorcycle. Spyders take some getting time to get used to.
Also, like most motorcycles, you will probably want to adjust the shocks and tire pressures to suit your riding style. Again, search the forum for information on this.