There are tons. First and foremost, Clearslide's billing practices border on predatory. They have a stealthy, indefinite term, auto-renew policy that attempts to charge the online credit card you originally signed with for a full year in advance every year unless you cancel 90 days prior to your original signing date. They also have sales reps who make verbal term commitments that fail to show up on the actual contract which they send over. They refuse to refund any monies which have been paid, even if you cannot use their service for any reason. Their core features are found on other tools out there for a cheaper cost and for less restrictive billing practices. Their customer support is virtually non-existent. If you have an important issue that needs attention, good luck. Stay far away from this company.
