I prefer the thinner tape, so I got the 1.8mm DSP. It was used for just under two years with a 40km, 5 day a week commute for that entire period in all weathers. There was some peeling of the top surface towards the end, but it didn't lose any of the grippiness which is why I was happy to continue using it. I can't imagine that anyone got two hours of use from it unless they were wearing sandpaper mittens, seems like a BS review to be honest.
Very very good tape in my experience, the Supercaz tape which replaces it does seem to be equally good and after a little over a year on the bike looks like new, although in that time I have done about 4k km on it as a result of the pandemic and working from home.
In my opinion it's definitely worth getting good quality bar tape as I spend my entire ride touching it, so I don't begrudge the £40ish for a premium tape.