I haven't yet taken my 5 man team into LFR, but I have taken 3 of them at a time. If this is your first raid, take one character and queue up. The mechanics in LFR are quite simple and any problems you have can be solved by a visit to WoWhead. Most of the hate I have received come when my dps don't pull a respectable their weight. As time has gone by, this is no longer the case.