I did it up north 2 years ago. The missus did it this year.
Aside from being scandalously priced its great fun but toughest event on the planet it isn't.
If felt a bit diluted to me this year......obstacles looked a bit repetitive. Walk the plank had gone, no electric eel, mud mile was pretty much a short pool instead of 8 pits, no log carry, bail bonds was basically a couple of lumps of hay.
I think Tough Mudder are starting to make the event more accessible for the average Joe. For example the missus put basically zero training in and nailed it.