I've had one experience with them and they were grisly. My partners one was fine. If the caterers haven't added a suitable amount of gravy or they're left in too long, then they're ruined.

I asked if there were any spare of the veggie option after, and thankfully someone had refused a meal. The crew happily obliged and I thoroughly enjoyed it (was a gnocchi in cheese sauce).

If done properly then all good - if not then it ends up being quite unenjoyable. Beef is risky.