I have a couple, and there are a few I have owned. I have a MIJ Black Label BOSS BF-2 that I love. But as you said, it can get very whooshy, but that is what I love about it.However, it is easy to dial in very subtle effects with the pedal. I had the MXR 117R, which sounded fantastic, with great extreme to subtle settings. The one thing I hated was it had a volume drop when engaged. My first flanger was an MXR Micro Flang which I like more than the larger 4-knob MXR. These days I use the flanger n the H9 or the H90. I also have a Moog Moogerfooger MF-108M Cluster Flux, which is the best analog flanger I have ever played, but they were very expensive when they were released and now collectors have driven the price of them out of reach for most people.
Here is me with the MXR Micro many years back