It will soon be three months that I use the XPA 250 system with speakers tsx15 JB (250rms). This amp is relatively cheap and is doing very well to animate the evenings in room 200 people. However, I do not recommend it at all for sound with a group.
In terms of reliability, there is no problem: It does not heat at all even if it requires a lot of it.
I would add just one more downside: it still feels a lack in relation to the power indicated specifications.
if I were buying again I will rather XPA500 to go with my speakers.