Nothing else like it? Uhm... good ol' Ibanez LOPRO* EDGE, anyone?? I've tossed the guitar around holding it UP IN THE AIR BY WHAMMY BAR ALONE, and not just once neither, over a period of several MONTHS - and I've yet to open the toplocks. Not once since purchase.
Oh, and on the up side? It can also do tremolo. Lol... and TODAY, and every day since the late 80s or early 90s, not "what if/ maybe someday" like that Evertune Trem. Lol.
* - and, presumably, the original Edge as well. Can't vouch for it, though, never having owned a non-LoPro Edge trem.
PS Also please note that seemingly all the shining reviews of Edge trems generally only salivate over Edge Original & LoPro Edge Original, so Your Mileage WILL Vary if you're staring at a 2000's IndoChinese Ibby trem with the Edge moniker. Moral of the story? Buy old Japanese and don't get caught tearing out yer hair and screaming "WTF?!" later.