I too recently picked up the kit, and agree with your overall impressions. I have not yet assembled the bikes, but the detail looks good, and the etch-shaping parts are a good idea. And the heads are nicely done, not the usual chunky-featured blockheads that are characteristic of Tamiya. My two small nitpicks are the fact the heads and helmets are bare (no straps on the heads, no netting/cloth strips on the helmets). I realize it's more realistic to fashion the straps out of lead foil or the like, but the instructions don't even mention this as an option. And the netting can be added, as you did, without too much difficulty. Same with the cloth strips.
That said, they're a welcome addition to my Market-Garden/A Bridge Too Far" obsession! Now if some manufacturer out there would please make U.S. airborne figures in 1943 uniforms, and not the 1942 Sicily/Normandy style, I'd be thrilled! And I'm talking action poses, not sitting or standing with index finger extended. Patience!