Are they worth buying after all this time, and what is good or bad about them.
Not particularly. The stories are very basic and aimed at a very young audience. On the plus side there's some really incredibly top notch artwork, and sometimes you get to see characters that never made any canonical appearance in other 80s comics, cartoons, books etc., e.g. Hubcap, the Omnibots etc.

Are there any specific issues or stories you'd recommend to others?
- Fight! Super Robot Lifeform Transformers #5
- Transformers Great War #1
- The Headmasters #5

How do they compare to the current era of Transformers comics?
Storywise they're pretty rubbish. Artistically they still hold up quite well.