We use Netsparker for scanning our customers applications. Ease of use and Flexibility gives us freedom to use it wisely and help is completing our projects in timely manner.
It has helped us build a good relationship to strengthen security in the products.
Netsparker is comparatively cheaper, and you can bargain i believe, compare to other tools like Accunetix etc. We compare a couple of them and decided this.
The problem is, if the scan has a problem it must be canceled, otherwise it will never finish and no report will ever be generated.
Many web apps are extremely vulnerable to serialization attacks yet Netsparker does not escalate the vulnerability enough (unencrypted viewstate, unsigned viewstate, etc).
The problem was I needed to download the reports problematically. Other times I asked for.