PRWeb is a good alternative to higher priced press release distribution services. It gets the release out there without costing an arm and a leg. For my startup, small business and nonprofit clients, it's a reasonable option. It allows you to include an image for the $249 level. It's pretty easy to use, too. Just be careful not to buy additional services that they may offer you as you proceed through the submission process.
There is some additional "red tape" at times with PRWeb. You have to have the client's permission to submit a press release on their behalf the first time you do it, which is confusing for the client and causes delays.
Also, their sales team always tries to push buying a "package" of releases. That doesn't really work for most of my clients, who only issue releases via wire occasionally.
And, they have a delay--you have to pay extra to send out the release immediately.
Definitely give it a try, if you're used to paying high fees for this type of service.
It's well priced for what you get. The release gets on the search engine to boost SEO. Compared to other services, you can't beat the price. Other services can be more than $1000, especially if you want to include any visuals. ugh. It shouldn't cost more to issue the release than what the client pays to have it written.