Great prices !!
I bought Continental PureContact from them 2 years ago. Great tires!, i think they beat every quote i got.
Installation is done by guys in the back jacking up your car. Seemed ok. Until months later when i was ready to put my winter tires on, my mechanic said it seems like someone over torqued the lug nuts.
So, good prices!! but quality of service is.... questionable.
I would probably get quotes for tires then minus the installation/balancing, and get them installed by your own mechanic. Or have joycity do the install/balancing and then get the torque checked afterwards.