Just replaced the Ver II with the Ver III for the very reason that the III was created - Brake Reservoir leak for the Viggen. Install is easy with the help of a rubber mallet (15 minutes tops).
The feel... I don't know if this will resonate with anyone, but the car feels "bigger". There is less chatter, or play in the front end - it feels solid and "muted". It may be my imagination, but the front end feels a bit more predictable.
If you currently have a GS Strut bar and want to be reminded of how much it improves the front end feel, put the OEM one back on and drive it for a few weeks (I had to, while I waited for the Ver III to come in). Slap the GS unit back back in and be ridiculed by those around you for that silly grin you will surely have.
Rating: [5 of 5 Stars!]