To Laskotop: If you bought it on the left side then it would have told you if there were any effects before you bought it. If you bought it from the right said that is the "gamble" section. It gives you a random chance to get anything from common to Epic items, but the price is always very high.
To abaileyatd. The skills max out at rank 1. So it's possible you reached the max rank for the skill. To Malabestia79, it's like any other rpg where leveling takes longer the higher your level. Use the map in the options to move to a stronger area to receive more exp. Also use Rebirth to have a level speed boost to gain more AP.
Two things: First, to flemishforce there is a purple experience bar below the stats box. If you hover your mouse over it it will tell you your experience needed to level up.
Secondly, maybe something that lists your Crit multiplier or how much damage a critical hit does.
I don't know what everyone is so upset about. I'm level 5, i've bought 3 weapons and 2 armor (with in-game currency) and I haven't spent a real dime. I'm on my 3rd quest, i've won most of my duels... I really don't get all the anger here. Sure it takes real time between when you can play again but that's how it balances it.
In addition you could apply the PC's engineering skill Helping other players. I'm not sure what the current equation is but this would be a more direct correlation.
Someone commented about engineers reducing upgrade times. An idea on how that might work:
Give the ability to place one survivor (engineer or PC only) on a build or upgrade project. Their engineering skill is used to provide a percentage increase to the speed of the project. It can be a small increase, maybe 1/2% or 1/4% (based on balancing) per skill point. Possibly affecting junk removal as well. This way the engineer would be useful, without being OP.
I increased the memory usage to 10mb. It said the game was only using 1kb and it still crashed while recycling. It doesn't happen every time but often enough to be a concern.
I've noticed that when speeding up the removal of junk around the compound the fuel cost is applied to the time remaining for 1 survivor regardless of how many survivors are currently working on the task.