I dont really see any improvement with this device. The 3d printed case is also too large to fit on a Flipper with the protective case on. If I remove the Flipper case it still barely fits in place. You have to be extremely careful or it will fall off. I messaged asking if I could have the stl files to adapt their design and did not hear back.

Does this work? Yes it does. But there are catches. First, seller states "Note that the device will reset to the internal cc1101 after being restarted or powered off." True if he used the 3.3v the flipper puts out. However this module uses the 5v and regulates it down. Probably the convenience of the pin being on the same header. You have to turn it on every time you enter the main sub-ghz menu. It reverts off whenever you exit this menu, it has nothing to do with restarting or powering off. This prevents you from using any apps that use the radio, thus limiting you to what's in the main sub-ghz menu. Second issue was the assembly. The boards were misaligned and soldered together crooked, boards were not parallel. There IS kapton tape to help prevent shorting as there is a lot of potential flex between boards. This also prevented the case from even snapping together, yet the unit shipped in this condition. I "fixed" the board and have a decent unit. I resoldered the boards parallel and added hot glue between to eliminate the flex and the case snaps together fully now. I also wired the cc1101 board directly to 3.3v. Not the prettiest, but it made it into a decent board which just works without having to turn it on every time (I now leave the 5v off). The seller told me it works only in the SubGHZ menu as it disables the 5v and external selection upon exit. It only disables 5v and the external radio still works as confirmed by one of the developers of the 3rd party FW I use. Anyway, the shipping was quick, assembly seems it was quick too, but it works. Much better with some modifications. If you like tinkering, this has a nice form factor and seems to work. If you want to simply plug and play be aware of the limitations and don't be misled.

I'm super happy with my purchased item was delivered quickly and packed nicely, It came with instructions and work great on the first try.

Using this with my F0 for a couple weeks now. No problems with the unleashed firmware recognizing the attachment. Seller promptly answered my question regarding the antenna connector (SMA). Range is noticeably improved for both Tx and Rx. I plan to buy another!