The UDR, sadly, has a less powerful CPU than the UDM. In return, it has eight times more built-in flash storage space than its older cousin. And it now has an SD card slot that only accepts a 128GB or higher-capacity card. I have 6 different people that i moved off of their legacy equipment and over to the UDRs. Some with APs or Cameras attached as well. No issues. Strong connectivity, great throughput. It resolved all their WIFI issues. Because UDR, UDM, UDMSE all offer different specific features with specific needs. But based on your comments, i don’t know why you are running a Synology when you should have your own Open Source router since you already have all the pieces in place but that. This works great for something VERY high end OR if you are leveraging their MESH system which will allow for better stability between the base and their Mesh APs. But for the average user, most of your devices can only support half if not a fraction of that ability.

So for a iPad or a personal laptop, it will not be equipped to have more connections then 2 normally with it’s 2 antennas. But 99.999% of the people out there don’t need more. Most of those devices don’t even support higher then 80hz channels. Though the new cost, which changes according to demand, makes it no longer a phenomenal deal, the UDR proved in my hands-on experience to still be the genuine dream router for many.

Ubiquiti UniFi Mesh AccessPoints

Still, Ubiquiti's UniFi Dream Router is one of the most feature-rich routers any home user can find, partly because it's an enterprise-grade device. You might not have everything you'd like from it, but you sure will get more compared to any other home Wi-FI router of the same price point. Ubiquiti UDR: Excellent performance Since i do not need ALL that airspace, i use just 80hz channels as i will still have the max speed needed for all my daily needs without noticing any real loss in speed.

I may sound like a fan boy but i have used and services various products, for the price, i have had the best experience overall with Unifi even tough they may be behind on software. Reply And it won't make sense for me to use the router for myself, considering my 10Gbps Fiber-optic broadband. So when I say I wish the UDR had a couple of 10Gbps ports, I mean it sincerely. Although multiple wireless APs can mesh to the same uplink, this is not recommended. This creates large amounts of interference and puts an abnormally high load on the parent AP, which will degrade speed and connection stability. Make sure there is a strong signal between your wirelessly meshed APs. Source: Harish Jonnalagadda / Android Central (Image credit: Source: Harish Jonnalagadda / Android Central)Second, how is the throughput when they are enabled? Are you able to achieve full 1gb speeds or is there a massive reduction? Dong, you have a number of replies to commenters complaining about the UDR’s performance under gigabit or near-gigabit WAN speeds. I understand where those replies are coming from since, yes, there are many details to factor in if you want to evaluate transfer speeds that most people won’t be aware of. However, the Dream Router actually has a problem that is unique to it and that has nothing to do with overhead due to headers or unstable ISP speeds or anything like that, and you really shouldn’t be giving Ubiquiti a pass for it.

At the core, both the UDM and the UDR are UniFi controllers designed to be the "root" device that powers an UniFi ecosystem of different hardware segments and feature sets called "applications." Ensure that your power and network connections are secure. If they are, but your issue persists, we recommend using our UniFi cables for optimal compatibility and performance. Verify Your UniFi Console's Internet Connection

What is a Mesh Network? 

Where it falls down, is speeds. The speed is totally fine for gaming or streaming movies, but Plume is not as fast as networks like the Eero or Orbi, and if your priority is transferring huge files, you’ll probably prefer one of those options. Ubiquiti Unifi