Passon 4 speed OD reviews wanted

I don't have a Passon
But in regards to small blocks and 5-speeds, this is a match made in heaven.

I can't speak to BBs but it seems to me they would have enough torque to not need much help from a low starter gear, and so as big a rear gear as a sbm needs is probably just gonna go up in smoke.If that were true, then the overdrive would put the cruise rpm down too low for most street cams.
Check out the line under my avatar
It shows the 833 ratios with a deep low. On the street, this might be ideal for a 3.23 rear, and a BB.Your starter gear would be 9.98, and your cruise gear would be 3.23;making 65mph, at under 2520Rs. And third gear will get you 120 at 6500. So this hits all the bases; starter, cruiser,and trap gear.The only base it misses is hammer down at 30 mph;you will have to use first gear. 30 mph with 28s is 3593. And that ain't too bad. You will need decent rubber out back.
If you are going racing, and want a 4-gear quarter, well then the 5 speed would have an advantage.and
If you are stuck with a 2.66 low, then 3.73s might be the minimum to get off the line, but this gear is all wrong for racing.
Happy decision making...
I know you were asking for reviews, so perhaps your mind is already made up, and so I apologize for wasting your time.