We have about twenty in service without any issues. They run cool at 50 watts all day long. The analog/digital switching is good and seamless. They also have something called pseudo trunking, you don't have to assign a time slot, you can allow the subscriber units to choose first in first out simulating a 2 channel automated trunking system. Standalone they are compatible with the Motorola equipment, but not using ip connect, the big M keeps that proprietary. We have the XPR stuff out there as well as the Hytera and the Hytera out performs the Motorola stuff in durability and performance. The Hytera repeaters and subscriber units come with up to 128 bit encryption with a 256 bit upgrade that can use a keyfill for additionally security. They have an analog version that is upgradable to DMR as well as a full DMR repeater. Really good price point and the darn thing just does not fail, not like the 8300 pa failures that never happen according to Motorola. We replaced all the 8300/8400 Motorola units with the Hytera stuff because of the support issues with Motorola as well as the reliability problems with the 8300 series. They are releasing R5 firmware early next year which adds some functionality. Overall it is a nice small package that delivers what it claims.
Yes, with a Hytera infrastructure you can utilize Motorola, Vertex, Hytera end user radios and vice versa. Its all the same standard ( the emission designations are: 7K60FXE (voice), 7K60FXD (data)). However, there seems to be some issues with linking up Hytera and Motorola infrastructure but there are rumors of fixes and ways around that in the works. As far as the overall quality and build of Hytera they seem to really be giving Motorola a run for their money. The Hytera dealers I know all have positive things to say about the Hytera repeaters and some died in the wool Moto fans have gone so far as to endorse the Hytera repeaters over the Motorola repeaters (just print out some batwings and tape it over the Hytera label is what I say). I think a lot of us are in agreement that the portables are incredibly too ugly with the antenna in the middle of the radio to actually own and carry though.
If you want to read up more on the standard here is some great bathroom reading material: