Hi Cindy, thanks for sharing your thoughts! Installation is much like furniture assembly in that it can be time-consuming but, having assembled several display wheels over the years, I've found putting on some TV helps pass the time. Plus involving your cat(s) during the wheel assembly makes for a lovely bonding experience and encourages their curiosity to boot!
Re: non-slip mats, I'll pass this feedback on to our manufacturer. A quick fix I've recommended in the past is getting a yoga mat or visiting your local dollar store or Bunnings for floor mats. I use two small carpeted 60x40cm mats underneath my wheel and they get the job done. If you're still having trouble finding a suitable mat, please keep in touch!