Let me put it like this there are 2 great extensions out there for crowdfunding. There's jGive by Techjoomla, and there's CrowdFunding by ITPrism. I actually subscribed to both of them to see exactly what were the major differences between the 2. Honestly they're both very good at what they do but what won me over was how fast Techjoomla was able to take care of my issue. They also have a nice little tutorial you can watch on youtube that they had with cloudaccess.net.
I am still somewhat new to the Joomla platform and at times when you hit a road block and scouring through forums to try and troubleshoot an isolated issue can become downright tedious and you don't know what to reference for help anymore. At times you just want to ask the developer possible guidance on how to solve your issue. And you want to be sure that you're not just investing in a quality product but the service also matches exemplary product that you're purchasing. This is why Techjoomla now has won me as a happy subscriber.
I had one of the hardest times integrating this extension with a template I purchased from JoomlArt and Amol did not stop until the issue was completely fixed. Granted it took 24 hours to fix between the emails and actually getting it solved, but thats completely understandable since there is a large time gap between my time zone and India lol.
If you are looking for a flexible CrowdFunding extension that looks great, is simple, straightforward, flexible with payments and rewards toppled with outstanding customer service (which is most important to me because Joomla is still in its short term phase), then jGive by Techjoomla is the extension for you. You won't regret investing your money with these guys.
Here are some small caveats for me though. Their website definitely could use some sprucing up and I wish they had a commenting system like StackIdeas Komento, however Amol said that they do plan on integrating it in the very near future so that's a plus.