So would you guys say the MPF is a better product to build with verses the DTFB? I'm tired of the DTFB paper delaminating so I'm looking for alternatives.
It depends on the application. The FT plans are designed for DTFB (~3/16 inch/4mm thick). RCPowers.com & FRCFoamies.com make park-jet plans designed for 6mm Depron. The MPF/Value XPS is of similar thickness (5-6mm) and can be substituted for Depron with little to no modification. DTFB can also be used, but the builder must take the difference in thickness into consideration when building with plans designed for Depron. The DTFB is also heavier.
One of the advantages of MPF/Value XPS is that it is considerably cheaper than Depron. It is less rigid/brittle too (this could be good and bad). Is it a "better" product than DTFB? For FT builds, I would say no. Although I believe the overall quality of the foam itself appears to be better (more consistent thickness and very flat (not wavey)), it's more expensive, more brittle than DTFB, and will not take crashes as well. I have crashed my FT Mustang so many times, I have lost count, and it's still flying (although half the weight is hot glue). Neither Depron or MPF/Value XPS would have survived this type of abuse.
With the right technique, the paper delamination can be mitigated. I coat with Minwax to create a protective shell out of the paper, and it works really well for me. The airframes are much tougher. I use packing tape for all my hinges, and I have never had one delaminate; even when the airframe was completely destroyed in a crash. You just can't beat the price of DTFB. I only use the other types because some plans call for the thicker foam. Otherwise, I would use DTFB exclusively.