I use the Park PCS-9 and it has worked out very well. It is very sturdy, doesn't tip over and does not damage the bike in any way. The only downside is height adjustment is via an allen wrench vs a speed clamp.
I guess it would be worth it if I actually knew something about working on bikes. This summer I plan to educate myself on the basics of brake and derailer adjustment. Is it possible to true a wheel by yourself?? I usually take my bike in for that stuff. Now that my kids have grown into nondisposable bikes, I really need to know more about basic adjustments. Last year I bought both of my kids some pretty nice Specialized bikes. My daughter's rear derailer needs some adjustment from time to time but it may just be the twist shifter. I really don't like those things.
Vern, I did all of my derailleur adjustments from info on the Park website, as Andrew mentioned.
Awesome idea about using your car rack for holding your bike when you do maintenance Vern!When I put together my bike I just used the bike carrier that attaches to the trailer hitch. It now serve two functions!!