I have been doing it for over 27 years and never had one come apart so it must work. I build with zap and tack it all together and then glue all the joints with wood glue. It doesn't add much time. I build a gentle lady in a night, covered it the next and never took less than third with it in a contest, electra the same build time, just built a Something extra that took about 4 nights, most of which was talking on the phone and not doing much building. Takes me longer to cover it than to build it.

The fillets on balsa to balsa are great, ribs to spars work well too. I wouldn't do it on firewalls though.