I have the PFL-XT2 (full base) which I ordered directly from China. It's interesting that Adorama is selling that version as it was my understanding it was made for sale everywhere but the USA due to a "so called" patent by RRS which they assert covers all 2 piece L-brackets. I guess the USPO considers screwing one piece of metal to another patent worthy. Another Sunwayfoto importer has told me they won't order any 2 piece L-bracket for any camera for the USA. A different small US manufacturer has discontinued producing all of their 2 piece L-brackets. I've been told prior art exists for this type of design, but the threat of litigation is way too expensive for a market which is pretty small.
Anyways, I've had the bracket for a while and have been writing a extremely detailed review and comparing it with the RRS BXT2. Not sure everyone is interested of this level of detail, but when I publish it, I'll come back and give a link. The TL;DR version is that it's a perfectly nice L-bracket at 1/3 the price of RRS. In general I'd recommend it, but if you do a lot of portrait mode tethered shooting on a tripod, the RRS BXT2 is a better choice. I don't know if the extender products from RRS (CRS) and Kirk (LBA-1) will fit the PFL-XT2, but if they do it might work for those situations as well, but you're then 2/3 of the way to cost of a BXT2 and it's another piece to carry. The PFL-XT2 will fit a Canon shutter release and still fit in an Arca clamp. It's a bit of cable threading gymnastics to get it in there and pushed in the socket, but it works and isn't too bad. There are also several other nits I have with their design, but nothing that the right split ring can't address. Since I use Peak Design anchors I wanted an attachment solution which doesn't use the X-T2 triangular split rings.
I like the full base version as you can place it on a table without concern for knocking it and having it sit awkwardly at an angle. Also like the ability to only have the base. The one piece is probably more rigid.