I have three covers, Rifles Only, Silencerco, and Elite Iron. I usually use the covers at the range and shooting prairie dogs. It seems like I start getting mirage after four or five quick shots. I tend to avoid a cover because i put my gun in and out of an eberlestock pack and I worry that at some point I'm gonna slide it out and pull the cover off without noticing. They are pretty spendy items to be losing, so I just use them only when necessary.
I'm not a huge fan of the Elite iron mode of attachment. I can never seem to get the strings and straps tight enough to really get it to stay tight. I do however like how low profile it is. If I could combine the silencerco and Elite options I'd have one that uses velcro but keeps a low profile. I've used the Elite iron one for two years and it's getting pretty shredded as one of the seals in my Lane Scorpion was allowing gases to escape and has done a number on the edges of the elite iron. Both mitigate heat pretty well, but I don't shoot major strings other than a 15-30 second 5 shot group with a few minute break before shooting again.
The rifles only one seems like a quality item. I haven't received my banish 30 yet so I haven't had a chance to utilize this longer cover. Just from initial observations I would say I should be able to get it tight with its string type cinch option. It also seems like getting the strings tight aren't as big of deal on this cover as the internals aren't fabric but a high temp rubber type layer. That seems like it's gonna stay attached even if it's not super tight. The downside of this cover is the weight and thickness. If my Banish would get out of prison, I could post about how it holds up and works with heat.
Prices on all of them are:
Silencerco: $56
Elite Iron:$50
Rifles Only:$85