I've been reading this with interest since I've been looking for a rack trunk for my commute bike to replace the over-used, old and mostly-dead Kirtland "Rac-Pak" that I've been using (probably 15 - 20 years old).
My problem is that with my commute bike (DaHon Folder with 16" wheels) all the new rack trunks I've tried cause heel clearance issues. Obviously not a problem for those of you on conventional bikes (or recumbents). Essentially, I need a rack trunk no more than 5-1/2" wide. Tall and long, not too much of an issue. And since I won't be taking it on and off very much, I don't have an issue with velcro.
So I will check back on this thread to see what other products are suggested to the OP.
Rick / OCRR