Was involved in replacing a large failing rail-tie retaining wall, roughly seven foot tall and 100 feet long. Had one engineer suggest unilock with geogrid but

Was involved in replacing a large failing rail-tie retaining wall, roughly seven foot tall and 100 feet long. Had one engineer suggest unilock with geogrid but after watching a lot of youtubes of failed unilock walls we went with redirock. Eleven years so far including snowy winters and doesn't look like it will ever move an inch.