Not compatible with Forge and doesn't work properly in SMP.
I'm fairly sure that ThaumicBees was meant to be in the pack originally. As for bees, yes they are awesome. But the ExtraBees machines completely ruin beekeeping (Not the extra bees themselves). They allow beekeeping fck-ups to make awesome bees with no work at all. Just turn useless rebred bees into DNA, make a serum, inject it into another bee and "poof" you have the ultimate bee with impossibly good stats that can work through the night, in the rain, inside and doesn't have any nasty status effects.
For Extra bees, since the update, you have chances of loosing the bee with your isolator, and if you don't use your purifier to get extra quality, you will screw the bee you were trying to enhance.
You make it sound like it's really easy and all, but it takes making a bee having the trait, in quantities to isolate it, then use quite a lot of liquid dna to fill it, and again a lot to put the quality back up.
Not to mention that they are costly to make (purifier needing 3 ghast tears for example).
Yes, they provide you with a way to make better bees, and possibly even changing species, but the last update of the packs introduced more cost to the process, and it's not like it makes bees really that easy.
It's more of a tool for people having delved quite far in bees already.
And "ruin beekeeping", there is the soul frames that enhance the breeding chances, but you still need to work quite a lot in order to discover the various species, it's not like you can really just make super bees out of nowhere, you need to have bees with the trait in the first place too.