I think, from what I have seen, that the tank and light strip are fine for fish only. The light is not up to the demands of plants but very few tank kit lights are. The filter and so forth are the cheapest available for a tank that size and in my opinion they should be treated as if they do not exist when you start looking at the value of the package. If the tank and light strip alone do not warrant the price being asked, don't buy it. If they look like a good price compared to a tank and lid only at another store then go ahead. A good quality filter and heater are not cheap anywhere but they can typically be obtained on line at better prices than at a LFS. A cheap filter and heater are a false bargain. I would rather spend $25 on a good heater than buy a new $10 one every 6 months but that is how I feel about many items in my life. Lots of options exist for good quality substrate and it depends where you are headed with your tank which one you should get. For cories and similar fish, sand can be a good choice. For plants, a rich substrate can be needed depending on your plant choices. For some people who like them, the colored gravel the LFS sells can be their best choice.