Most class-up packs are just additional pieces that you add to a class (and nothing else), while this expansion pack includes armor parts from the Liber Swordman/Swordsman kit. It is fully compatible with Silhouette 1 kits (Archer, Assassin, Knight, Lancer and Priest). I haven't tried putting it onto Silhouette 2 or 3, but from experience I can tell you that they generally won't fit that well.
Swordman double parts: Head parts (face, back head plate and crest), chest and back plate, shoulder pauldrons and waist armor (back, side skirts and front piece).
Besides all of those gold parts, you also get a golden spear.
The dark red parts:
Red Roman style Crest and red plate for the gold face plate
Full round shield (works on its own and you can slot the Swordman gold shield onto it)
Large ringlet sheath (also works as an in-between attachment part for the shield)
Left and Right cape halves - Literal halves of a cape
Two cape holders, so you can attach them anywhere individually
A single cape holder that combines the two halves
Cloth styled parts for side skirts, as intermediate parts for the shoulders and the back of the shoulders
A cloth strip/Pennant for the spear (or anywhere with a 3mm hole)
'Fantasy Spatha' style long sword
Great Sword, sword expander - Slots the spatha into it and fits into the Ringlet sheath
Thoughts:
The 'great sword' also fits the golden spatha that the Swordman has, it's identical to the red one. The Knight long sword does not really fit into it, nor does the spatha fit into the sandwiched Holy Knight 'great sword' upgrade and probably likewise the Paladin versions, but I don't have that Class Up, so I don't know for sure (since only the blade goes into that one and not the cross guard).
I like this style of 'class up' where you have extra parts, so you don't have to rely on buying the kit that it's based on. This is definitely the right way to go for the 30MF line.
The biggest advantage of the line is its modularity, but instead of having extra armors, it's mostly specific to the individual class kits and is too dedicated, in my opinion, so while you can't use all the red parts on all other armor parts, you at least have an extra set of armor that you can use on most other Silhouettes.