I run a tidepool II on my 75 gallon & it does a superb job. One male JD, 3 male cons & a 6" Royal plec (cichlids are all full sized adults).
I find that the plastic it's made of is quite durable really.....in that it has a rubber like flexability to it that's less prone to cracking than some acrylic sumps I've seen IMO. The sump accomodates a 250 watt ebo jagar heater (18" long) & a mag drive 7 pump with room to spare (for what, I don't know).
Three roomy drawers that are extremely easy to access allow many combinations of media. I personally just use mechanical media here but you could fit a lot of cell pore there if you wanted.
The bio-wheel is fricken huge compared to anything on a power filter. One thing I like about it is.......during water changes, when I shut it off, the wheel becomes submerged which preserves the bacteria. My output to the tank is situated below the surface just far enough to backfill the sump enough to allow this.
With a bioball chamber I would need a bypass so I could keep it running so the balls wouldn't dry out. Another plus is full utilization of the biomedia via the design of the wheel. With bioballs, some of them scarcely even get wet depending on drip tray efficiency.
All in all, I like the Tpool. Mines been in service for nearly 3 years continuous so far. One thing I would advise is to make a cover for it to decrease evaporation. I just cut one to fit out of the styrofoam lid from a fish shipping box. Works great.