You can build with little tech or design help
I have launched three different cloud Jive communities (both jive-x and jive-n) with varying degrees of technical and design help. One of the best things about Jive is that people without html or tech skills can create a community relatively quickly and you can change the look relatively easily.
Jive delivers a strong user experience. UI is better than other platforms I've used as an end user (Higher Logic, for example, is not great for community members). The @mention feature in Jive is key to driving community engagement.
One area that Jive needs to work on is providing better tools for community managers. You can't fully copy groups and spaces; you can't create standard categories to select from when creating a new place. Much of the work that could be templatized is not. This means that community managers are forced to do more tactical work which prevents them from scaling quickly and doing more strategic work that could help transform the business.
The Jive customers are the best resource. When you buy Jive, you join a very strong user community of like-minded professionals who have your back.