I have used both the Holga TLR and the Blackbird Fly, and I must say that as far as plastic TLRs go, I prefer the BBF, even though it's 35mm. The three formats you can choose from to shoot in are great, and while the Holga TLR takes great shots with the usual light leaks and vignetting (which the BBF doesn't do), you can get the same kind of image with a regular Holga. Plus the BBF is smaller & can be tucked away nicely if need be.