Great question. I haven't used it myself. I'd be curious to see what you find out.

I am biased due to the fact I work for a stone/solid surface fabricator; however, I'd like to weigh in. My thought is this, if it's the only way to get what you want at the cost you can afford (which I'm not sure how much less it is) then have at it. I have concerns when it cracks and now there is a substrate (old top underneath) between the 2 tops where mold,bacteria etc can fester. I'd much rather get the real deal. Even better is to look into a 2cm=3/4" Quartz (Cambria, Zodiaq,Silestone) where you sacrifice a thicker material for something strong, stain resistant, non porous that does not require sealing and can probably run around the transformations cost. Tips for top shopping: Get everything itemized, this may be a bother to some but this will help you understand exactly where the costs are for price shopping. Good Luck with your projects!

Granite Transformations is a great solution for homeowners looking to remodel their kitchen or bathroom. The installation takes days instead of weeks because of our unique installation process that includes no demolition and Trend Stone and Trend Glass overlays. We manufacture and install our own products and have been in business since 1996. We have more than 150 locations in 8 countries, so we offer expertise and efficiency in home remodeling and design. Here is a link to some customer testimonials from former customers. http://www.systino.net/organizations/2544/reviews/public

Granite Transformations
www.granitetransformations.com

I may be biased too since I actually work at making the materials used by Granite Transformations. in terms of pure strength, the materials used by Granite Transformations are also used as floor tiles in TONS of commercial projects int he USA. Here are some: Volkswagen Headquarter, W Hotel Atlanta, Pomerado Hospital San Diego, Kaiser Permanente Hospital in Irvine CA and in Denver CO, UCLA, FIU, ASU, UF and few other universities, Tyler School in Washington DC, FAO Schwarz in NYC and many many other. the reason why our material is selected for these very prominent jobs is because it is extremely durable and easy to maintain. Architects and Designers love what we can do with a thin material and how fast it is to actually install. the core idea behind Granite Transformations is to be able to use an engineered surface to "re-do" an existing surface in few hours, so an homeowner can be back to her/his normal life right away.
so, rather than commenting without knowing about a material...I would do some research, because in terms of mere technical characteristics...engineered stones in general are better than Natural Stones (and yes, I have worked int he Natural Stone Industry for 15 years...so I know one thing or two about it). then if your want to see some images of projects done using the materials sold By Granite Transformations...you can look here: www.zangzing.com/marcellobe (it is a photo gallery...unfortunately, Zangizing will cease to perform this service by the end of August and we are looking at an alternative).
hope I was able to give you some good info

by the way...Granite Transformations has over 160 stores between North America, Australia, Italy and the UK with an average of 4500-4800 kitchens being done every months, and by laying our material on top of an existing counter, we save from landfill an average of 22 million lbs of waste every year....just for your info

I love to hear from people so passionate about there product. Great representation and information. I am sure it will help the clients decide which way to go. I prefer to mix quartz and natural stone that way you get the best of both worlds. Maybe a solid surface piece here and there too. My dream kitchen would contain, Natural Marble, Natural Granite, Quartz, Glass, Wood and Metal. I am not Anti anything, I am Only Pro making the customer happy :)