I started to read that description and got a little lost myself. The fellow blowing the companies horn is dedicated but not very informative.
My first experience with the plate type heat exchangers made a believer out of me, We had a set of shell and tube coolers that were not meeting guarantee and it was our fault plain and simple. When I got on site the scope was to change out the coolers in a hurry, We are usually meticulous about oil flushes and super conservative in regards to design margin and machine reliability.
Knowing that we were going to be trying to avoid an oil flush we were concerned about cleanliness in all aspects of the demolition and re-construction, I had some plans regarding how we were going to handle the piping welds and such. I had no experience with the plate type cooler at all, I took a trip to the manufacturers plant and left feeling like the cooler cleanliness was going to be a minimal consideration. The simplicity of that design was really impressive. The replacement cooler for my job was so small compared to the existing coolers that I went back to design to make sure all the I's were dotted and the T's were crossed.
The thing that I did notice in the write up and graphic for the Dimple type was that there were no through bolts (threaded stock) which made me wonder if the whole stacking concept had been abandoned. I am having the same problem as you are with their description. I just don't have that need to know motivation to work through it.
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If you fail to follow through, you will fail.