What features should I look for when buying an espresso maker?

An espresso machine usually needs to push water at somewhere between 8 and 15 bar pressure, which is quite a lot. And since it is the high-pressure components that are key to how they work, it is the quality and durability of these that tends to set the price point.

The quality of the pump varies from a device intended to be used for two or three cups once a week, all the way to professional machines designed to produce thousand of cups a day, month after month. This is why domestic machines are usually quite clear that they are for domestic use only: they simply cannot cope with the duty cycle of any more than that. Many domestic espresso machines will turn themselves off if they are used to make too many cups in one session - quite simply, they overheat.

It sounds like one you bought is one intended for occasional use. My advice is to visit a couple of retailers that have staff dedicated to selling espresso machines. They will, of course, try to sell you "their" brand, but they will also recognise when someone needs a domestic unit designed for daily use as opposed to one just for special occasions.

As a bonus, you generally get what you pay for with espresso machines. The more expensive domestic ones usually really do last much longer.

There is no right answer for this.

the 2 main things I'd look for:

• 15 PSI or more
• a way to adjust and keep temperature as constant as possible

My current machine does well on the first point, terrible on the second.

This is only tiny part of the answer to good espresso though. Beans, freshness, and a good grinder may take you further for your money.

The difference is not just about the espresso shot but also the milk-steaming ability. To get sweet, velvety milk is a real challenge on a cheaper machine with a plastic frother (you can usually get better results by just taking it off and using the naked pipe).

If you're prepared to go on a journey of discovery, a Gaggia Classic is a good place to start. You can get them online for about $300. This is about the cheapest machine that offers the flexibility to make great espresso. You can swap out the steam arm for a metal one, switch to a plain, unpressurised basket and adjust the pressure (with a few tools).

Anything cheaper than this is too limiting (if you're interested in honing your skills). Pressurised baskets will never allow you to get the full richness out of your beans, and render the arts of grind and tamp redundant. Plastic milk frothers will never be able to create perfect microfoam (and keeping them free of rancid milk gunk is a pain).