ESR makes great products in general. I purchased an iPad Air keyboard case - fits great, customizable in being able to reposition the tablet in portrait or landscape, good typing experience and love that there isn't a "kickstand" behind the case so I can fit it on smaller surfaces.
Their customer service is great. I was recently emailing them, they responded quickly, and provided very helpful tips / recommendations.
Highly recommend their products.
Claim your business profile now and gain access to all features and respond to customer reviews.