About to purchase this cleaner, yay or nay?

as long as the vacuum and pressure work, and you don't rush.... almost any machine will do the job, provided you use the right chemicals and give them and yourself enough time to work.  

bring a bucket with you, hopefully they'll let you give it a quick test.  make sure you have hp lines and vacuum with it and a wand, if they offer it.... test to see how it sprays (if it sprays, see if the vacuum works, check for both vacuum and water leaks, from the machine, from the drain valve and fittings on the lines.... if everything seems good, go for it, if you do a few jobs or more, just do yourself a favor, don't  be a charity/non profit company, charge what the work is worth, it's hard to pay your bills, upkeep, chemical and fuel costs and eventually have the money for another machine when that one dies or even repairs to it.   don't cheap out, buy decent chemicals/spotters and deodorizers.  Believe me, some people will always complain about the price and some are glad to get it done, reguardless of the price.... target the high end, work less (work yourself and your equipment less) and make more money.... Time is the one thing you can't replace... make money while you can, and enjoy yourself while you can.

Damans;

Great advice above. Are you in the States? That unit is a 220-240V according to the brochure on the site.

Ask your IICRC trainer and you will learn that 350 PSI is the minimum you should have.  You can always buy a different pump and upgrade your machine.