I bought my first BF-2 around 1980, when I was enamored of the jet plane sounds Pats Travers & Thrall were getting on the live album "Go For What You Know". I knew they used A/DA flangers, but I figured a flanger is a flanger, and the BF-2 1) took up much less space and 2) ran off a single 9-volt supply. It also did a pretty good imitation of the Travers jet.
Shortly thereafter, I discovered The Police's and loved Andy Summer's sounds on "Regatta de Blanc". I may have know he was using an Electric Mistress, but again, I didn't know the difference in those days. "A flanger is a flanger." I soon realized that the trick to his sound was to turn the Manual all the way down, and use minimal feedback to lessen the swoosh. And again, the BF-2 did a pretty damn good imitation of the Mistress, without the need for AC power or excessive pedalboard space. I've been using a BF-2 ever since. I've tried the BF-3, but Boss made its controls more wide-ranging, making it hard to dial in the sounds of the BF-2. I recently spent a lot of time trying to ape the BF-2 sound on an MS-3 multieffects and got close after realizing that the trick is to imitate the lo-fi limitations of '80s technology: limiting bandwidth with EQ rolloff, stuff like that. I got close, but the BF-2 is much easier.
I really should have a spare, should check on Reverb. OTOH, if Boss issued a BF-2W I'd buy it in a minute. I already cashed out of my '80s CE-2 and replaced it with the Waza version.