I am a practicing structural engineer with 30 years experience and I would say that if you have a problem of settlement  of poorly compacted fill it is likely to be a very good solution.  If on the other hand you are on an expansive clay and your cracks are opening and closing as soil moisture varies in the 2.5 m beneath them, then I would suggest that this is not a long term fix.  To get a handle on time frames maximum movements may take from say 5 to 20 years to occur so if you are selling next week then again this may be for you, although you may not have done the purchaser any favors in the longer term.  One risk that is seldom discussed is that if they do close an open crack and the moisture changes to the old profile the crack can no longer be closed so new cracks may emerge nearby.  20 years on the situation may therefore have worsened as a result of the treatment.

I am not saying that Uretek does not have a valid role at times but it is certainly not in my view the  'silver bullet' that others in this forum seem to be indicating.