Been using a gig bag for many years for a 35+ year old Gibson ES335 I've had for over 25 years. I played it, learned to play on it, gigged it. I kinda retired it a few years ago, it might not take another refret, but still play it from time to time. It seems it may be worth something now, $$$, I decided I ought to maybe take a bit better care of it, so I bought this hard case.
It is not a perfect fit, a little too long, wide, and deep for a 1980, 335 body. It is not a Gibson case, so I didn't expect it to be perfect. I put a little sponge at the bottom and it seems fine, doesn't move a lot, you could always add a little more if you think it needs.
I have used it mostly for storage, so it hasn't had to deal with much abuse, but I think it would be better than a gig bag!
I am satisfied with my purchase, in my opinion, it's a very reasonable deal.