On the one side we have a commercially competing entity arguing against HBase and on the other side we have an individual "defending" HBase who never contributed a single line of code to open source HBase promoting their own closed source solution.
HBase is a "Sparse, Consistent, Distributed, Multidimensional, Sorted map" and at that it is pretty good.
Other stores are either not consistent or not sorted by default (which means you cannot do range scans). Some can be configured to do that, but then suddenly all those nice claims made by the commercial entities backing them just vanish.
If you do not need consistency and range scans, then do not use HBase. If you do need those HBase will be a excellent fit.
Some of the most heavyweight entities on this planet have committers to HBase (Facebook, Intel, Salesforce, to some extend Twitter, etc) as well as commercial backers such as Cloudera and Hortonworks.
Disclaimer: HBase committer here.