I did a lot of research before switching, and the reviews for AgentOS were decent. It seems that since then, its all gone downhill - our experiences seem to match others which are similar. Main issues: 1. No support whatsoever once you're onboarded. Phones are never answered, emails are rarely responded to and when they are its a 4-5 day lead time. If you have a problem that is stopping you advertising a property or paying a landlord, you're going to be stuck and people are going to be calling you angry. 2. The data import was expensive and awful - a bunch of our stuff was added but with details wrong, included tenancies not signed, percentage fees wrong, etc. We were told AgentOS would handle the import, which they did, we were also told they'd be on hand afterwards to help us fix problems that arose. They weren't. The agent we were assigned to help us with the transfer basically told us they were done and to contact support - who as stated don't reply. 3. Setting up the portals (Zoopla and Rightmove) took nearly 2 months, despite repeated chasing by both us and the portals. AgentOS sat on their part for a while and never really explained anything. 4. They missed the deadline for setting it up. Our software had a cutoff date, which we rolled past and had to make do for a while. 5. Training is a bit subpar, in that there really isn't anything formal besides online documentation. What they do well: 1. The system has an API that you can access quite easily using node, something that I've had a lot of fun with personally but then I'm a nerd. 2. It genuinely is all cloud based, and a lot of stuff can be automated (provided you know how to code automation using APIs) 3. They forget to bill you sometimes We're signed in for 2 years, I'm considering rocking the boat to see if we can get out early but at the same time if it settles into a rhythm it might not be necessary. I'm just aware that this has cost a lot of sleepless nights for multiple people at the business, and has also cost us a lot of business in terms of Landlords complaining about being charged the wrong amounts, not getting their rents, or their properties not being advertised promptly. If you're looking for an easy switch, I'd be tempted to look away from this one and perhaps look towards a PSG offering (Alto, Jupix, etc). EDIT: AgentOS have responded to my review (Ironically faster than they responded to a support ticket on these issues) and a lot of their comments are fair. 1. Some of the issues that arose from onboarding were related to our source data, but the ones we're specifically trying to resolve weren't. Specifically the management fees - which in some cases have been changed to random figures that don't match our source data. In one example, the source data says 5%, it was originally put at 5%, then as part of an attempt to repair it was changed to 10%. This is the owner of the business, they've never paid 10%. There are a few issues like this where the issue doesn't match the original data, these are the ones that I think prospective clients should be aware of. 2. The pace of the onboarding wasn't the issue so much as the pace of the import. We supplied data on 16th March (off the top of my head, maybe a day or two out), wanted to be live "Before April", discussed with Ian that we'd want to be live a week ro so before, but the import was done on March 31st. We can see that our end. 3. The trainer spent a lot of time with us, but we did pay for 5 hours so I'm not really sure why this is relevant. If there was a formal system we weren't able to get it - we actually emailed asking for formal training on specific days and never got a response. 4. To be clear, while I think the on-boarding could be better, it wouldn't be nearly as problematic if we were able to obtain support. Phonecalls go unanswered, emails go unresponded, and the fact that it took nearly 2 months to get the portals up and running sort of evidences this. We've lost business and instructions because of AgentOS's poor support service. If things improve I will adjust this review.