MessageBird

Easy to use
Works as you want it to
Reliable

I cannot think of anything i like least.

Easy to use by uploading excel files and sending mass text messages by selecting which columns are originator, message & receiver.
Good visual on the incoming replies and visibility of the conversation thread of each message.
Easy to add the number as a contact to the database.
Easy to export the data onto excel.

Need to have the ability to export onto excel the entire conversational thread per message/contact.
The Messages do not batch together...they come on separate lines. They all need to continue on the same thread on the "SMS Overview" page.

You can send messages effectively. The developer pack seems good. My developers are looking ot interface. Summary information on usage is good.

The export functionality is really poor. I supply security officers. I want to see what time officers text to book on and off. The columns move about in the export making analysis hard. Hours tidying the data before being able to move forard. The length of time information is held on the webpage is limited. If i wanted to look back over several months, this is not possible.
The search functionality is limited.

MessageBird is ingeniously architected, from features to branding. The dashboard is beautiful and intuitive, and documentation and supported features like the flow builder are very well done and easy to use. Pricing is competitive and subscriptions are easily set up and managed between developers and multiple clients.

MessageBird is restricted by their "provider" who severely limits sms content, frequency and volume. If there is ever a technical issue, chances are they will have to reach out to their provider for details or assistance. Customer service responds to messages with about 4-24 hour delay, so most immediate concerns go unanswered the first day, although their follow-up and resolution is near perfect.

The price for the quality of product is pretty amazing. We get 99.9% of our texts instantly. We refill our credit for about $50 every 6 months. We added additional security to our network for pennies.

The customer service can often be slow. You have to rely on text-based chat since it is located in Amsterdam. The customer service reps are always very polite and informational, but the wait (especially during critical downtime) can be excruciating.