Make sure to grab the free keyfile.
Always preferred Lzx to Lha. I still remember when I got my '060 card for my A4000, converting nearly 10,000 BBS files from lha to lhx. Man those old hard disks grunted and groaned a lot. I thought I was King S*it of Turd Island with that 4091 card and 1.2 GB HD that cost me $1400, lol.
Fun fact. Guy that wrote lzx was arguably more well known for Xenolink BBS software on the Amiga back in the day. He was also a really nice fellow and insanely talented. Anyone that ever ran Xenolink would tell you now, nearly 20 years later - what a screamer of a program that was. ASM code at its' finest.
Was a real helpful fellow in the early days of the BBS scene here in Canada.
He later went to work for Microsoft in 1996, in which the lzx algorithms were rolled into .cab files, as well as .chm, .lit, and XBox avatar files. The tech is still deep in MS products these days, so depending on your outlook that's either a good or bad thing

Believe he still works for Microsoft to this day - Jonathan Forbes.