I must say I am quite happy with my 50 gallon trash can livewell.
It's round, easily portable, takes up no room when it's not in use (we store it in the Vberth during spring and fall striper seasons, and we take it off the boat during the early summer. Late summer we put it back on the boat because we net live peanut bunker for fluke & weaks.) We do not use the livewell for killies... The portable killie flow trolls do that job just fine.
To each his own, but my trash can livewell keeps 40-50 adult bunker alive all day long.
We even ghetto rigged the pump. The pump is a cheap bilge pump hose clamped to a bilge pump hose. we toss the pump over the side when we stop, and bam, fresh water shoots in to the trash can. When we move we grab the hose and stick it in the barrel ....Bam. Recirculating livewell.
I do plan on putting a dedicated pump with a sea strainer and sea cock in the boat, but we fish my boat VERY VERY hard, and getting time away from wetting lines is few and far betwixt.
The nicest livewells i've seen on parkers are the custom made jobs. That being said, my livewell will keep bunker alive better than a rectangular or oval well. Bunker are idiots, and will swim in a corner and die.