I really like my rinehart rhinoblock, it's held up good after 3 years of use. I was shooting the crap out of it when I first got it with both field points and broadheads. I got bored shooting the broadhead insert so I started shooting the deer side with broadheads so that put some more wear on it but not much... When I buy a new foam target whether it be 3D or block, it'll be a rinehart.
Since I starting using a Rinehart about five years ago I have had no reason to use any other target. You can wear them out but I would say they have to be one of the longest lasting and arrow removal is pretty easy. I prefer the RhinoBlock targets but the 18-1 is good for portability.
I have gone through a lot of BH targets, because at my DL and KE, I am tough on them. So far the 18-1 has held up the best though I did get a free one for shooting it out within the first year. I found the Rhinoblock not very good and I shot out the Blob pretty quick too, plus it leaves chunks of target on your shafts. I am at the point where my next BH targets will just be cheapies and throw them away when they get shot out.