Car and Driver Rwanda Uganda

HI, have been looking at hiring car/ driver to go fro Kigali to Fort Portal, Uganda. Have been quoted $140/ day for this excluding fuel from Kabirurwanda web site. Got held up and was not able to get back to them for a few days and they e-mailed again saying they were now offering a discount of $20/ day to $120 / day for 4x4 and including drivers expenses and accommodation. The ready discount has got me (maybe unfairly ) a little suspicious, but the prices seems good. Has anyone had dealings with this group www.kariburwanda.com and are able to recommend them or not, thanks for any help