Pros: Good entry level, light use espresso machine.
Cons: Touchy on tamp pressure and grind.
Full review
The price is right. The DeLonghi EC155 is a good choice for someone that wants to find out what making espresso at home is all about without breaking the bank. If you find you really like making espresso and latte drinks and want to do so daily you'll outgrow this unit quickly. However, if you're only going to "brew" something up once or twice a week it might serve your needs for a longer period of time.
I bought the DeLonghi EC155 because it was inexpensive. It has served me well and will most likely do so for a while longer.
I've found a few factors that determine the quality of the espresso to be a bit touchy: The pressure of the tamp; How even the tamp is; Fineness of the grind. Take a little extra time and try different combinations until you get one that works well and produces a good espresso with adequate crema.
Naturally, these are factors with any espresso machine, but I've found the less expensive units to be more sensitive than a $400 one.
Keep in mind that this is a $70 espresso machine. Don't expect more from it and you'll be fine.