Its a great little machine. *I have owned my for 9 months now and dont regret it at all. *For your budget its definitely the best option. *
However, it is, as you know, only a single boiler machine. *I use it for both milk based drinks and espresso, like yourself. *It copes fine with 3 double shots (poured back to back) followed with enough steam for 6 regular sized drinks. *This is its maximum capacity and I dont use it like that very often (once every couple of weeks). *If you need to regularly do more than that it will take longer because of the need to refill the boiler and have it come down to brewing temp.
Your espresso will be greatly improved but give it a little time as you learn the ropes and adjust your methods etc.
and welcome to CS!