他の方のレビューにもありますが、スマホ装着時に結構力が要ります。
それ以外は特に問題ないと思われます。

かなり使い勝手良いです。
サイズの大きいスマホGalaxyNote3で利用していますが、説明にあった通り、片手で取り付けることができます。
購入してから、3ヶ月ほど立っていますが、車のダッシュボードにしっかりくっついています。その表面は、シボ？（ザラザラ）ですが、問題ありません。

iPhone5を使っていますがサイズも手頃、ホールド感も良いです。

I am the happy owner of "The six immutable laws of mobile business", by Philip Sugai, Marco Koeder and Ludovico Ciferri.

I found this book while surfing on the net, searching for information about mobile business and I think that what convinced me to buy the book, was that they were many interviews with successful mobile business owners, like the founder of Mixi for example. For the whole list check [...]

I didn't really know what to expect from it but I had the feeling that it was going to be interesting...
And it was! Here are a few learning from this book. (I don't want to spoil to much)

I learned that most of us, have misconceptions about why the mobile industry is so advanced in Japan and the and the authors have done a great documented work to debunk them.

I learned, about the Japanese Mobile ecosystem and understood the reasons why the WAP was not designed to be as successful like the I-mode.

The chapter 3 relates quite well with a project I have been working on, because it discuss about how the mobile phones have evolved from a simple wireless phone to an empowering tools for its users and even for businesses.

The final chapter defines the new era of Simplexity, which is a stage where complex technology starts to become more user friendly and intelligent.

I have personally discussed with two of the authors and want to thank personally Marco and Philip for giving me priceless recommendations, about what I should think about before starting the development of my project.

If you want to start a mobile business, even if it's not in Japan, I personally recommend you to read this book. There are few concepts that I didn't even know they were existing like the time zones, but they turn out to be very important when thinking about the business model.

5 merited stars, that's my opinion.

車のダッシュボードにもしっかり固定することが出来ました。少し値段が高かったが、買ってよかった。