My better half and I will be going on our first trip to Europe early next spring--five nights each in Madrid and Paris, followed by nine nights in London, split into three and six nights sandwiched around three nights out near Stonehenge. I have, with an enormous amount of research, put together daily (probable) itineraries, relying greatly on RS books and these forums--both have been so useful! I will post detailed trip reports as a way of saying thanks.
Anyway, as I plan things out, one thought is occurring to me: the Paris Museum Pass seems much more useful than the London Pass, especially since the PMP seems to allow skipping the ticket line at most, if not all, sites. The LP--not so much. The plans I've made do show the LP will save perhaps £75--£100 and afford the opportunity to pop into an unplanned "lesser" site, if such arises. Of course, the amount "saved" is off list prices, not discounts that appear to be frequently offered. I want to save bucks as much as anyone, but I also want to save time when in London, so...timed entry passes are looking better and better, especially with 2 for 1 discounts and such. I saw yesterday a "deal" where buying combo Big Bus HoHo and London Eye tickets earned skip the line privileges at the Eye. I assume similar deals are available for other sites. I am not particularly fond of the idea of timed entries later in the day as timing becomes an issue (we can't stay at this site we are enjoying because we'll miss our entry at the next site), but they sound great for sites that start the day.
So--two main points/questions:
1) Do you find the PMP offers more flexibility than the LP?
2) How do you view the money savings of the LP vs the time savings of pre-purchased, timed entries?
Please do comment beyond those two items and thanks in advance for your comments.