We stayed here in 1999. We found that the hotel had recently undergone something of a rehab. The room seemed freshly painted. Carpet, bedspreads, toilet and tub seemed brand new. The room was clean and odor-free. We did have a non-smoking room. We were on the 6th floor overlooking the small courtyard and pool area. The lobby was clean and had an open-area restaurant. Kids 12 and under eat free with paying adult. The pool area was small, often crowded, but pretty clean. The area on 192 where this HI is located was a bit congested, but it rarely took us longer than 15 minutes to get to WDW. It's definitely a no-frills kind of resort.
Do your co-workers have children ? Are they getting an exceptional deal here ? Since this is their first trip to WDW I'd encourage them to go with a Disney value resort instead so they could partake of all the Disney perks (transportation, EMH, package delivery, charging privleges). I just think they'll have a better experience onsite being they are newbies. I honestly can't say anything bad about the HI Maingate West, but it was nothing too special either. The ONLY reason we stayed here is that my local grocery store was offering vouchers of 3 nights for $99 + tax. This gave us a good reason to have a last minute, unplanned get-a-way to WDW---but we've been to WDW MANY times.