I bought the anniversary kit with the intention of upgrading to RCBS when funds allowed, but to be perfectly honest the LEE kit does everything I need.
The scales are a bit fiddly to set up but once you get the weight right the powder thrower measures the loads with good consistency. It could get tricky if you want to load for more than one calibre, in which case I'd recommend a set of digital scales. I only load for .223 so I just leave the powder measure set at 25grns, it could be a hassle if I was to keep swapping from .223 to .243 but I just use factory .243 rounds for the amount I use.
In addition to the kit you will need a set of dies, a case trimmer, a case holder, vernier calipers and possibly a kinetic hammer.