Interesting - I'd not seen the Fortex RF100 before. As mentioned by dave_k it appears to be an ITECH RF-A350 which you can buy on AliExpress for less than half that price, but of course you have limited support or warranty when buying direct from the China manufacturer.
I bought myself an ITECH RF-A350 mid last year to replace the PUHUI T-962A I had been using for the last 6 years, and I've been quite impressed by it. The control panel & display isn't that intuitive, but once you select the right profile for your PCB mass and paste type it just works. I've not yet investigated the PC software, or done any detailed monitoring of the temperature profile as I just needed something I could hit go on and get on with other work.
I'm seriously considering getting another one (probably the smaller RF-A250) so I can alternate jobs between them as the overall cycle time is a bit longer than the T-962A. The total shipped cost of an RF-A250 appears to be roughly the same or cheaper than buying a new T-962A, so I'm surprised anyone would still be buying those. The only positive of the T-962A is the alternate firmware available for it, which I found made an average reflow oven to be somewhat useable. Unfortunately my T-962A is terribly inconsistent in results depending on where in the oven drawer I place my PCBs, which I haven't noticed on the RF-A350 - not that I've used the full size of the larger drawer yet.