The Gaudi crypt was excellent - although we almost missed our opportunity to see it. The guard was on the point of leaving (a little early) when we arrived. The visit to the factory town was interesting; we had a group lunch for 8 euros each at a local place that caters to workers. Excellent food - especially the bean soup.
The Montserrat portion in the morning could have been better organized. There is a mass in the church, with times posted in a permanent sign; the tour cannot get in then and shouldn't waste time trying. We were told the children's choir would be singing at 1:00; they actually started at 12. However, the visit was very satisfactory.
The tour guide was terrific, very attentive to the needs and desires of members of the group (6 of us). I highly recommend the tour.

We would have liked a bit more information on the buildings and monuments we drove past in the bus, but the tour guide was working in 4 languages, so she couldn't do everything. She was an excellent guide, and we enjoyed both portions of the tour very much. We also opted for the lunch at a restaurant in El Poble Espanyol and it was delicious. We highly recommend the one day tour with lunch.
Please note that if the stairs at Park Guell are too difficult, there are switchbacks available just outside the wall. The "longest bench in the world" is also incredibly comfortable - offers back support I wish I had at home!

As seniors, we didn't need the discounts offered at museums with the Barcelona Card, but if we were younger it would have saved us even more money. The discount at the Turisme shop was wonderful. I recommend buying this card for just the days you need the museum discounts and for shopping at the Turisme office in Placa Catalunya, using it for transportation on those days (must be consecutive), and getting the 10-ride tickets for further travel.

Excellent value. More than worth the money just visiting 3 of the 7 museums. We ran out of time for the rest. Not having to stand in line counts for a lot too!