Dlguard is an online solution that allows you to secure and deliver your digital goods, be it an ebook, or software, or a zip file, etc. It also allows you to set up expiry dates of the download page, and if for some reason the customer missed to download the product, you can resend the download email message to the customer via your admin panel.
Although the security feature is the primary reason others choose DLGuard, it wasn’t the main reason for me.
The main reason I got DLGuard(v4) was … the signup form for DLGuard’s membership module requires only two customer fields! While other membership script requires a lot form fields to be filled out when you register for some membership access, like address, phone number, country, etc., DLGuard only requires the email address and password. This for me does the job for what I needed.
I don’t want the intimidating long signup forms for anybody who buys a product of mine, only two will do. 
It makes the customer experience much easier and it’s really what I only needed. I notice the same experience when I bought other people’s product powered by DLGuard and they only had two fields for me to fill out and it was simple and easy and gives you a hassle-free experience.
Sure, you may want to require other customer fields, but if you want simplicity DLGuard does that job superbly.
Not to mention that DLGuard also has a shopping cart module, can set discount coupons, is easier to setup, and is connected to the customer’s payment info so that anytime a customer requests a refund, it’s easy to cancel and deny his access to your membership site later.
Plus another feature that I chose DLGuard is it’s ease of integration with Getresponse!
So if customer buys your product and you want him to be added to your Getresponse list, you only need to put some of your Getresponse info while setting up the product and any customer who buys your product will be automatically be added to your list without him filling another form!
Moreover, what makes this product seen as above the others is the phenomenal support given by Sam Stephens – the owner! Seriously, look at the DLGuard forum, almost every support thread has been answered by him! If you want install help, just ask away.
One thing I don’t like though, are the default templates… but that’s just me. Anyway, it an easy job to deal with since DLGuard is template-base which means you can use your own template and just insert the necessary DLGuard variables you want to display.
So yeah, DLGuard – requires only two fields, great security feature, membership module, shopping cart module, template base, easy, great support hmm … what else…
(Oh, there are a lot more features I didn’t mention here since this isn’t really meant to be review only my feedback.)
