Ultra Racing have a number of strut braces to suit most makes and models. They are generally a direct bolt on affair and allow for easy installation/removal. Ensure that you check your manufacturers torque settings for the strut bolts! They have also illustrated the effects of a strut brace which makes it easier to comprehend.
Our only concern is that they look slightly off putting in a powder coated gloss white. We purchased one for our project car (F30) and immediately painted it black for that cleaner look.
For those who also own an F30 and looking to purchase one of these, check out this eBay seller. They were easy to deal with and shipping internationally was not a problem.