having repaired many a customers crappy department store bikes i know first hand how bad these can be...not only assembly wise but also quality of parts. they just plain do not hold up and work so poorly she is sure to not enjoy riding it long term. Check out the giant simple single, its giants cruiser that is pretty similar to what you posted but much nicer quality and the backing of a bike shop for only $100 more, also much cheaper than electras which i think the singlespeed townies start around $380 so that one would be even a bit harder to spend the money on.
http://giant-bicycles.com/en-US/bikes/women/1278/29349/
good luck getting her into riding