and HajoFlyer, I will do this promo with two programs (Mileage Plus and miles&more): the bonus will then be 110'000 miles (plus the actual flight miles) - and the long-haule transatlantic flights (a must to make this promo count for the UA Mileage Plus program) I have booked long time ago already without knowing this promo.
I will earn about 135'000 miles in total and spend (in add to the already booked before transatlantic flights of SFr 790 = US$494) another SFr. 900 (US$ 563) for more flights now.
The total costs (including the trip I would have done anyway) of $ 1'057 divided by 135'000 miles = 0.008$/mile.
I, for myself, value a bonus mile 3 cents (UA) and 2 cents (LH). The (about 10'000) status miles I value, for my private calculation, as 6 cents (UA) and 8 cents (LH).
I know that there were better deals out there (like the KLM comping promo this spring), but I see no 'harm' (only profit) to do both (I already did the KLM comping promo).