I just finished building a Fotodiox DIY TLR (same as Recesky). Luckily, they are about 5 miles up the street from me, so I picked it up from their warehouse.
It was a bit fiddly to built, but I got it done! I may put one roll through it, but I bought it mostly for the experience. Obviously this is an extremely simplified version, but it's cool to have somewhat of a better idea of how TLRs work.
I've also got a LCA+ that I use occasionally. It's a nice pocketable camera, though I would like to replace it with an Olympus XA2.