MAD_JOCK
The only problem that I've had with Open Office, was that in the version that I used (ver 3 from memory); Libre Office, was, when editing large documents i.e greater than 15 pages, Libre tended to become very slow indeed.
Note: I was using a Portable with 3 Gb of ram and a slow Dual core 1.8 GHz processor under XP or Vista + Norton or ESET and virus software.
Under Linux, the same spec P/C's things were better but still slower than Microsoft Office 2003/2007.
CAT III