I love Intronis. We have been a partner since 2009 and have a full 1 TB backed up.

For 7 years we used a product that we ran in house on our own servers that cost us thousands per year in maintenance. The last few versions of the product caused more and more problems and became very unreliable.
When I got sick of it I researched and tested many products and decided on Intronis.
Intronis is not the cheapest and not the most expensive.
I think it's the simplest and best channel-friendly SMB solution out there. Setup is a breeze and only takes a few minutes. Your client can even download your branded installer and manual and set it up themselves.

There were three things I was looking for when I was testing products:

1) It had to work without a lot of human intervention. Intronis is nearly bulletproof. The product backups files as you would expect plus Exchange and SQL databases. The scheduling is great, the automated reports to the client and myself are great, and there is very rarely anything we need to do. We have done many restores of real client data and never had a problem. Ever. Not even with Exchange or SQL. I can guarantee 100% data recovery and that's a wonderful thing. There is no manual steps needed to monitor as Level Platforms has a policy module for Intronis so a ticket is automatically created to check up on any warning or errors.
The updates are also automatic. I no longer have to remote for free into computers that didn't take the upgrade. Seamless and automatic allow me to keep my costs down and provide great service.

2) The support had to be stellar and had to be North American. Using the previous N****** product we had consistently bad tech support experiences. The Intronis support experience via e-mail, chat, or telephone has been exceptional. I just can't say enough about how they quickly can fix anything. The only negative thing I could say is that their support isn't 24x7x365. Fortunately, the one time I did have a question at 3 am on a Sunday one of their support techs actually did reply to my e-mail and resolved the problem.

3) It had to be brandable - easily. Our last product forced us to hire a graphic designer and web designer to be branded. Intronis takes care of that for you. Give them your logo and they brand the software, the manual, a website, and marketing materials for you.

We weren't specifically targeting cost issues, but we were definitely on a budget. We found the products meeting our three requirements either were very expensive, had high partner buy in cost, or had confusing price tiers. Intronis was the easiest to justify cost-wise.

The one bad thing I will say about Intronis is every once in a while the program seems to get kludged up if you have missed some backups because a really long one was running. Scheduling backups with proper windows largely resolves this and setting you RMM tool to restart the service takes care of the rest. Overall, a lot less tickets than BackupExec.

Overall, we are very happy with Intronis and plan to continue using it for those clients where a BDR doesn't make sense. With the new web portal we can now manage, backup, and restore clients without a remote session. We can also configure backups using tape style rotations like weekly, monthly, yearly and set custom retention so I gave them an A for customization.

As a previous reviewer said - Intronis is a no-brainer.