Really, the only thing to do is try it out and see if you like it.
The one I had I ended up giving away to somebody at the range ... you would have thought I gave the guy the whole scope...lol. saw the guy a couple of months later and while he recognized the same issue but I did, he liked it and kept it on.
Another thing I've done is use a small towel, about 18 inch by 24 in. You ever seen a work crew where you see the guys wearing a hat and a towel under them draping over their shoulders ... that. Doesn't matter if you have a baseball cap or a boonie style hat ... when needed take the towel out drape it over your head and scope.
I've also tried pieces of stiff wall tubing, rubber or silicone in place of the specific made eyecup. It works, just not pretty and you'll probably have to use some type of heat source to flare the eye end.