Learn Turkish: Özetle, oteldeki konaklama beklediğim kadar iyiydi. - In summary, the accommodation in the hotel was as good as I expected.

Özetle means in summary or to sum up, derived from the noun özet (summary). It works perfectly here because you are giving a final verdict on your experience. You could definitely use kısacası (in short) here without changing the core meaning. Sonuç olarak (as a result) would also work, but feels slightly more formal and implies a logical conclusion rather than just a brief wrap-up.

Why do we use oteldeki konaklama instead of a noun compound like otel konaklaması?

Adding -ki to the locative case (otelde) turns it into an adjective meaning the one in the hotel. So oteldeki konaklama specifically points to the exact accommodation you experienced. While otel konaklaması (hotel accommodation) is grammatically correct as a general category, oteldeki is much more natural when referring to a specific stay at a specific place.

How does the structure beklediğim kadar iyiydi build the meaning was as good as I expected?

This phrase relies on the object participle -dik. Beklediğim acts as a noun phrase meaning the thing that I expected. When paired with the postposition kadar (as much as), it creates the structure as much as I expected. Placing this right before iyiydi (was good) gives us was good to the exact extent that I expected.

Where does the word come from?