Its certainly difficult to find decent flexible panels at this time, lots of cheap crap out there. I've been caught as well. Currently I'm trying the juice panels. We'll see..
Solbian seem the best, but are a horrendous price here.
Check your warranties carefully. Some are short (1 yr) some longer 5,10 or even 20 yrs, but only on the individual cells. These warranties are a waste of time - its the top covers (PET or whatever) that fails, but its not covered!
I don't recommend anything at this time.
I originally had 2 unisolar panels out of the US. Lasted over 10 years. So good flexible solar can be done.