I haven't stayed at the Days Inn for around 8 years, so there are probably other posters here who can better comment about the current quality of the hotel.
In terms of getting to and from the parks, check out Mary Jo's excellent aerial photos in the following thread:
http://www.disboards.com/threads/days-inn-rodeway-inn-mickey-and-friends-parking.3481467/
As shown on the photos/maps, the two basic options are:
(1) cross Disneyland Drive, head south, then double back west and take a tram from the parking structure
(2) walk all the way to the park via a path on the northern boundary of downtown Disney
A third option (probably the best option), mentioned by Disneyxica20 within this thread, is to head west on Katella for one (quite short) block, then head south through the Disneyland employee parking lot, and make your way to the tram via the parking structure. The potential problem with this option is that it is unclear whether the guard at the gate will allow people to walk through the parking lot. My understanding (based upon Disneyxica20's comment earlier in this thread) is that there is currently no problem with hotel guests taking the shortcut through the parking lot.