The 8255 is a great addition to any 8085 SBC. The ability to have input and output bits available makes the controller useful for many applications. It would be better if the port C pins were brought out to a header like the other two ports.
Very high quality kit, easy to assemble, but you'll have to dig around on the website(s) to find instructions and information. I wish they would put everything in one place, clearly labeled. The board works perfectly. I'm using it in a PT68K-2, which is an Motorola 68000 CPU motherboard in a PC/AT case. Of course the XT-IDE IBM PC BIOS is useless in a 68K machine, so I'm writing my own hard disk drivers in 68K assembly language. It's slow going, but so far, so good, and the XT-IDE board is working just fine. I have not tried it in my PC/XT clone yet...
Took quite a while to ship and was missing some parts, unfortunately I never got a response back on the missing parts but was easy enough to source them locally. Other than that it works well and does the job. No documentation but the board is clearly marked with what need to go where.