I totally agree with the positive comments about Vietnam. It is a truly wonderful place.
The Cu Chi Tunnels do give a rather biased slant on it and any Americans that are in any way touchy about it may not like it. I don't know what they expect.
Certainly a few I've bumped into in Saigon after going there were a bit put out saying "the whole information was all lies". Mentioned a few films they'd watched as a reference !!.
We all know Hollywoods' track record of conveying what actually happened in certain previous conflicts is rather less than impressive after all. The above certainly proved that.
However, I would definitely recommend going there to see the place. It's astonishing what they actually managed to do down there. If you're claustrophobic then you won't get very far !!.
A fabulous Country.