The marketing and sales pitch. If you read the marketing material, it looks like Clustrix is a great product. The reviews of the performance (by the CEO of Clustrix).
The actual product performance. There is a significant gap between what is in the marketing material/sales pitch and the actual performance. After a lot of money and a lot of time, it became clear the product does not match the promise. The company was very keen to take our money, not so keen on delivering a solution.
I would say do not give this company money until after you have proven the software will meet your requirements. It may be the case that this small company's product will fit your need. Find out first. We made the mistake of paying first, testing second. The company was very quick to state that, even though their product would never meet our requirements, the contract is signed and they expected us to continue paying. This was a major mistake we made, do not follow our footsteps.
Database performance is critical to our SAAS product. We are always looking for new technology to help drive performance the ActiveDEMAND marketing automation platform. We have realized no benefit whatsoever from our experience with Clustrix.