Personally I would not buy or recommend Mutable Instruments clones - unless they are discontinued, or are something like supercell - which is expanded - or I was going to build them myself
Why?
1. you have the space in a 104hp/6u case for full size ones
2. the originals are designed with ergonomics in mind - ie they are nice to play with - a lot of the clones - are not they are designed to fit in as small a space as possible
3. and most importantly - Emilie does not get paid for clones - you want more exceptional MI modules - buy the originals - the money goes to the original designer - buy a clone - the money does not - also MI support for MI modules is great - for clones non-existant

yeah you might save a few $/€/£ (and a few hp - but it's the same really), but in the long run is it really worth it?

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities