I think the overall "Flying Spirit Experience" is the same, no matter which airport you are using. Here is a thread with links to other threads about Spirit, and if you use the search function you will find a ton of opinions:
We've flown Spirit several times in the past from DFW to LV and once to MCO. I don't have any complaints about them but I read up and knew beforehand that they charge extra for everything. We always weighed our bags before leaving home so we would not get hit with an overweight fee. This trip we actually found SW flights cheaper so we didn't fly Spirit.
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