I can't fault delivery, I ordered it on the Sunday and it was delivered on the Tuesday via Amazon Prime.
The battery looks like decent quality, not too dissimilar from the original and it fit's as easily as the original too.
The problem is the battery seems to be degrading rapidly. I have a desktop app that monitors the battery levels. After fitting I charged the battery to 100% and the app told me the battery had worn by 16%, I accepted this as the battery is higher capacity than the original, however 3 weeks later the battery wear is now 32%, so after just 3 weeks of use my battery now only has 68% of it's original capacity left, not impressed, god knows what it will be like in another 3 weeks!
The battery is attractively priced, but you do get what you pay for. When this battery dies (which I imagine will be soon) I will pay the extra and get an original Dell battery!