Flexible solar panels

Yes, they're pretty reliable if permanently installed on a flat surface and not walked on.

Although they're "flexible" they don't bend or flex very much without breaking and so always follow the instructions that come with them of how much of a flex they can handle.  (Don't use them as a "wobble-board" like a YouTube guy did as they do break)

In the boating world many flexible panels that have been in use for 10+ years  have now deteriorated to the point of being useless, whereas rigid glass panels of similar age are still working well.  There is also the factor that rigid panels generally tend to have a higher output for a given area.

Of course PV technology is advancing all the time, so past experience is not necessarily a guide to future performance.

If you google them there seems to be reports of problems with them. Closer to home Cyberyacht has had problems with one. It's a real shame because the weight saving would make them a no brainer for me otherwise. 

My understanding is that they are use the same cells as the rigid panels.