I have the glass WPA and it sits in the device super sturdy, particularly if you cut down a flexicone+. The biggest downside I have experienced with the glass WPA from MV, is that the reclaim is so fine, like there are only kief-sized Scooby snacks that get past the o-ring filter, that it doesn’t collect on the sides of the vapor tube like most vapes, so you have to clean it often or else the reclaim will dribble down into that bottleneck & messes with the airflow, causing it to be like a reclaim micro-bubbler.
I ordered my SonG WPA from
@Delta3DStudios, and it shipped earlier this week, but I have yet to receive it to test drive it. Having said that, I own the Delta SonG for my Crafty+ and it has never had a negative impact on the flavor, not even on the first session.