It seems like it would be if you had worked up to the size. Unfortunately it's out of stock on Eden and on closeout sale on Tantus's website, so it might be one of the one's that they're discontinuing.
If you're looking for an anal dildo I'd recommend staying away from any highly textured dildos until you really know your ass and can keep it relaxed at will. On a dildo such as the Echo (or the Fun Factory Tiger), clenching down while thrusting can easily get to be too much.
I wouldn't recommend for anal. Even though it's silicone the ridges and girth would make this toy difficult to use anally unless you're very experienced and know you can handle that kind of experience. I'd recommend working up to it.
I do think that you'd have to work up to it. Try the acute or curve first. Maybe even the charmer to see how you handle the rippled. The tsunami looks big though, so I personally wouldn't recommend that one.