Is Google's GMAIL Drive less user friendly?

In my earlier post related on Microsoft's Sky Drive I mentioned about Google's G mail Drive. GMail Drive uses the inbox of the Gmail account to store files and creates a virtual filesystem on top of the Gmail account, enabling the user to save and retrieve files stored on the Gmail account directly from inside Windows Explorer. GMail Drive adds a new virtual drive to the computer under the My Computer folder, where the user can create new folders, copy and drag-and-drop files to, but does not give an actual drive letter, such as C:, preventing its use in all DOS applications, and some older Windows applications.
Multiple user can simultaneously log in to this drive and use the same files at a time.At 1st though Google bring this new technique of online accessing the files but after launching the Microsoft's SKY Drive it is lagging with some features with SKY DRIVE.

Advantage of SKY DRIVE over Gmail Drive
1.Storage of SKY DRIVE is 25 GB
2. Max size of adding each file in SKY DRIVE is 50 mb where its only 20 mb for Gmail drive
3.SKY Drive has password protection security.
4.You can share your uploaded file links with your friends and the download speed is quite good.
5.In Gmail Drive you can't able to upload .exe and .zip files but in SKY DRIVE you can't face these type of problems.

Download Gmail Drive (153kb)