Years ago I installed an 11-meter dipole just out of curiosity and did not like the reception on my base station CB (a Texas radio CB). I opted for the Antron-99 vertical and have used that ever since. I don't believe I have ever heard someone say they were satisfied with a dipole antenna on 11-meters. For about $100 I think you will find that the Antron-99 is the only CB antenna you will ever use for a home base station. I use it with my Galaxy DX-2547 with great results, and my vertical is just at roof level. I installed it on the other side of my house to avoid any interference on other radios when I transmit our weekly Neighborhood Watch Net. My SWR has been perfect from day one and I get check results in the 100% range. Very satisfied with this particular combination. Dipole just didn't cut it.
I've owned two A99s, and both worked great when they worked. For the money, and ease of use, they do what they're intended to do. Much of Sirio's aluminum stuff blows them away. My GPE 27 5/8-wave outperforms my A99's from the past, but an A99 is, again, easy to use and easy to tune.
They're not 8db, or even 8dbi like the manufacturer claims, but they're decent. At least Solarcon hasn't messed with them like they have the IMAX.
But getting back to dipoles, I've had nothing but good luck with them. I don't know how someone could mess one up. I had a vertical dipole that was 50-feet-up in an oak tree and it hung with any A99 on the air at the time. Most people use them indoors as a compromise, which will not hang with an outdoor vertical in any circumstance. Yeah, tuned right, it'll beat a magnet mount mobile on the roof any day, but you're already at a handicap with that application.
I have a vertical dipole that I made out of household extension cord, 15 feet off the ground, and I make contact with stations in other surrounding counties. Dipoles suck trying to mount vertically if you don't have a tree, but with the right mounting location, they will talk.