Legendary or Year One car seat resto

Has any one had any experience with Year One or Legendary car seat cover restoration? I would like to try the install myself. I phoned around town here and the shops are telling me $1800-$2000 to do the job which would include seat covers and new foam. I thought that sounded pretty high!(low budget minded) Any way, are the covers hard to install, and how are the fit and finish? The guy at one shop told me that they are garbage and he would never buy them.