Pros
PLT is doing basic research in an area which needs it - quantum dot chemistry for solid state lighting. The technology may benefit humanity in the form of better and more efficient lighting. That is the only positive about PLT. Likely all patents will be sold off when the company finally folds, and the people who did the real science will see little or nothing for their efforts.
Cons
Pay for the people who do the actual work is poor compared to industry standard. The company is out of capital and is running on prayers for VC infusions, resulting in poor pay for salaried employees, late pay for contract employees, and crippling layoffs. The best talent has all either left voluntarily, been laid off, or is actively seeking other employment.
Senior management is completely incapable of running an actual business. Management engages in acts which are quite arguably unethical, such as gaming contract employees to see who will accept late pay, and hiring people despite knowing they have no capital - sometimes interviewing people well out of the metro area, who could end up moving to Portland for an insecure job at a highly unstable company.