I liked it. It's one of the first larger CTF's I've done. There are 5 levels, the first 2 are more knowing your Linux then hacking, the 3rd and 4th are exploiting, and then there's a 5th level that is castle vs castle. Though each level is a new subnet(at least 3, 4, 5) and for the most part only contain a few computers(Not sure how many are on offsec's, but from the reviews i've read, there appear to be many more). You use their launch platform, so your are very limited with tools (There is metasploit, but it's an older version) which in the end turns out to be nice. It forces you to learn how to do it without using the tools you may not have in a network.
I do believe i learned a lot(I've done a handful of boot to roots and 1 other CTF on that scale but was mostly windows machines and all exploited via metasploit), and as far as the price, my company picked up the bill.