I did not work at UMC, I worked at Covenant and had good working conditions while there. Most people I know that work at UMC left Covenant only for the Sign On bonus and they all said that they enjoyed there 2 years they spent there, but they ALL came back to Covenant. UMC is a teaching facility that some people have trouble adjusting to that type of environment.
As far a Lubbock as a town, I loved living there. We moved when my husband graduated from law school. Lubbock is a super friendly town, and getting around is very easy. All numbered streets (82nd, 66th, 19th) run east/west, and then named street run north/south. And then THE Loop will take you around the whole town. Shopping is good for a town its size. Big mall, good grocery stores (United). Good luck in your decision!