The thing about this deal is that United business class is usually around £1400 (which is a lot of money for any flight). Its not so much that this has been reduced, more that economy is so dear at this time of year that the difference is more bearable. If you're going to pay say £1000 for economy then it would be worth paying the extra for business.
I flew business class with United on Easter Sunday from NYC to Belfast for just £200 more (went there economy, came back business class). Your seat has buttons that make it into a bed without affecting the other passengers (its the only time I've ever slept solidly for hours on a plane which made a big difference on arrival). I'm 6ft and could lie completely flat. The pork chop dinner was great (as was the free brandy and ginger ales). They also give you a pack with an eye mask, ear plugs and other bits. Your TV is also twice the size with better headphones waiting for you (the movie selection is the same as economy but the choice was brilliant, around 50 movies including the latest Star Wars). I had to ask for headphones (twice) in economy and only got them half way through the flight. There were 16 people in business class with at least 2 air stewards looking after us and we had our own toilet so no queuing. I'm spoiled now. I think I'd pay £350 more on a long haul. Remember you'll also get larger baggage allowance (and possibly more airmiles?)
Great, glad you found it useful! Seemed to get a lot of cold votes... which is interesting considering this is less than half the normal cost... Seems people are voting here purely on the total cost, vs. the value/discount this offers over the standard cost for business class flights!
Avoid the 777 aircraft with the 4 in a row business seats, they are pretty rubbish! However, pick a route with 787 and 767 service and you'll have a seat that compares with most other airlines! :-)
United business class isn't great, feels like premium with more room. My favourite is air New Zealand, but they only fly into lax.