Heavily weather dependent. Essentially you are making $40 gamble that the sky will be clear and there will be a solar storm. Good if you are for an extended period of time in Iceland and ready to try multiple evenings, otherwise you are out of luck.
What you will really see on this excursion is Wailing Wall, Holy Sepulchre and Bethlehem. The rest of the places of interest you are going to literally 'pass". As in "see from the distance". You will walk through the Old City and spent considerable time in shops. If you are fine with that - it's a good tour. The only reason I give 4 instead of 3 stars is the excellent efforts of the guides in Bethlehem.