amigakit wrote:
There are not free alternatives that enable the last two channels
Of course. If you need four IDE channels then it is a very good choice. A good collection of software with an easy to use installer, the hardware you need to use four ports and a reasonable price.
However if all you want is 48-bit LBA for hard drives larger than 128GiB or support for ATAPI drives including DVD-ROM and you just want to use the standard 2-channel IDE connector then look no further than Aminet, Amiga.org, EAB & Google.