With PG, you have to be very careful. They do have a habit of planning a lot of flights spread over the whole day and in the end, cancelling one or more of the daytime flights. I more than once got stuck at BKK for 8-10 hours, due to this habit. And they even refuse to book you on an earlier flight (unless paying a hefty ticket change fee) and only move you on later flights, or (once) on an alternative carrier. For the return leg onto a LH, I had to book very early PG flights to not miss my LH connection. More then once, I got moved to a later flight.

And once they stopped luggage check-through on separate PNR's I stopped using PG all together ......