Sengers article, The Engineering of Experience, was interesting because I had never heard this point of view before. Most computer scientists/software engineers generally enjoy their work. In the second section, she compares computer science to Taylorism which she negatively described in the previous section. Engineering the human experience is supposed to fun, but optimization techniques are not necessarily excluded from creating a more enjoyable experience. People generally enjoy when technology works seamlessly so I would argue that performance is a vital aspect when engineering the human experience.
The second article, Making Sense of Experience, gives an informal framework for designing for experience. The article gives a good starting point when starting to explore a design with four threads, or broad categories, of a user experience. I liked that they give a general explanation for each thread and challenged the user to elaborate each thread when necessary. Every experience is different, so this type of framework needs to be flexible. For example, in the fifth section, there was a suggestion to include a concept of physicality and I agree a physical embodiment could be an extension of the spatial-temporal thread. An extension to that thread would have to be adapted by the tester to get better results on this specific experience of buying CDs. Other experiences may call for different extensions.