Depending on it's intended use it's a decent piece of gear. We installed a single HX5 and 2 of their 12" subs at my last Church and it took very little eq to get it sounding good.
The HX5 can not be externally bi-amped to create a tri-amp system with subs and it won't rip your head off with SPL but it's a clean and fairly versatile speaker.
It may get louder than I expected with more than a single HX5 but the subs are good for mid bass alone. We only had that system up for a little over a month before I left that Church. If I would've stayed, I'd have added another HX5 for a L/R hang and added another pair of their subs to be flown with the HX5's as mid bass and used a 3 way x-over.
The online version of EASE of TOA's site leads you to believe you can pad down each "box" in the HX5 individually for better pattern coverage but you can't. It's a single NL4 input to the internal x-over to supply power to each "box" in the speaker. There's also a thru NL4 for jumping to another HX5 in the hang.
It's limited in it's splay angles but it can be flown either vertically or horizontally to get the coverage you need. it "acts" like a line array in a way and ss you tighten up it's angles it the beam becomes more focused vertically and you start to lose a bit of outside coverage but not a ton. For our use, we needed to go vertical and when we got the best overall coverage we had holes in coverage in the very front corners of each side. Wasn't a worry for us as nobody sat there anyway.
All my processing was handled by the Peavey FX32 we already had at the Church. I used it in subwoofer mode and split the signal right at the board. I used the boards x-over, PEQ and limiters and then ran out to the amp. The HX5 and the 2 subs were run from a single QSC GX7. it was clean and plenty loud for the congregation and type of service they have. Their worship service was a piano, keyboard, electric guitar and @ 10 vocalists. If we would've had a full worship band, I'd have wanted at least another HX5, another amp and subs. I would've then had a L/R hang with a 12" sub flown with each HX5 for mid bass for a bit better warmth.
The person who set up the sound originally is on the Church board and when they finally addressed the coverage issue, they decided they wanted new and my predecessor asked me to look into this system. I used the tools they had online and talked to their engineer and rep and came to the conclusion it's gonna be a pretty good fit, and it really was..
Overall I was really impressed with it's natural sound. Didn't take long to get dialed in and was clean. I would love to hear a system with multiple HX5s and a real sub system to see what it does.. I have contemplated buying a couple pairs of the HX5s for my company and trying them on various events to see how they sound..
Hope that helps..